There is a fruit called the 'squirting cucumber' that fires its seeds like mini ballistic missiles. But how does it do this? Researchers seem to have solved this mystery -- a question that has baffled scientists for hundreds of years.



The results of a recent study, based on a myriad of experiments, high-speed videography, image scrutiny, and advanced mathematical modeling, are published in the journal Proceedings of the National Academy of Sciences (PNAS).



<h2 class="wp-block-heading" id="h-understanding-the-squirting-cucumber">Understanding the squirting cucumber</h2>



The squirting cucumber, or Ecballium elaterium, derives its name from its unique method of <a href="https://www.earth.com/news/plant-seeds-go-dormant-to-avoid-harsh-conditions/" target="_blank" rel="noreferrer noopener">seed</a> dispersal.



As the fruit ripens, it transitions into a seed-launching machine, that can shoot out seeds enveloped in a jet of mucus-like fluid.



In a minuscule span of just 30 milliseconds, the seeds are propelled at speeds of around 20 meters per second or 44 miles per hour, enabling them to land a considerable distance away (approximately 10 meters or 33 feet). 



This is equal to around 250 times the length of the fruit itself .



<h2 class="wp-block-heading" id="h-decoding-seed-dispersal">Decoding seed dispersal</h2>



Despite the fruit's intriguing <a href="https://www.earth.com/news/birds-increase-forest-recovery-by-dispersing-seeds/" target="_blank" rel="noreferrer noopener">seed dispersal</a> method, the mechanism behind it -- as well as its impact on the plant's reproduction -- remained elusive until recently.



Scientists from the <a href="https://www.ox.ac.uk" target="_blank" rel="noreferrer noopener">University of Oxford</a> and the <a href="https://www.manchester.ac.uk" target="_blank" rel="noreferrer noopener">University of Manchester</a> ran a battery of tests on Ecballium specimens grown at the University of Oxford Botanic Garden.



These experiments included capturing the seed dispersal in motion using a high-speed camera, conducting indentation tests, measuring the volume of the fruit and stem before and after dispersal, and observing the fruit's changes through time-lapse photography. 



Armed with this data, the team devised mathematical models to describe and understand the internal and external mechanics at play.



<h2 class="wp-block-heading" id="h-fluid-distribution-in-squirting-cucumber">Fluid distribution in squirting cucumber</h2>



The team's rigorous approach resulted in the identification of key features of the plant's <a href="https://www.earth.com/news/insects-play-a-much-bigger-role-in-seed-dispersal-than-we-thought/" target="_blank" rel="noreferrer noopener">seed dispersal strategy</a>. 



These involve a highly pressurized system, fluid redistribution, rapid recoil, and variable launch - that together form a sophisticated launch system.



The fluid redistribution from the fruit back into the stem, a feature thought to be unique to the squirting cucumber, was among the most significant findings.



<div class="wp-block-sendtonews-playerselector">[sendtonews key="4NlCX5nNI6-4062310-12187" type="single"]</div>



<h2 class="wp-block-heading" id="h-fine-tuning-for-successful-seed-dispersal">Fine-tuning for successful seed dispersal</h2>



The team's mathematical model helped them explore the effects of altering different parameters, and revealed that the squirting cucumber's seed projection method has been naturally fine-tuned for optimal dispersal and propagation.



For instance, making the stem thicker and stiffer led to a narrower <a href="https://www.earth.com/news/woodlice-prove-crucial-players-plant-seed-dispersal/" target="_blank" rel="noreferrer noopener">dispersal area</a> and, therefore, a lower survival rate.



On the other hand, reducing the fluid transferred from the fruit to the stem caused the seeds to be ejected at accelerated speeds but with a nearly vertical launch angle, again resulting in reduced dispersal and survival rates.



<h2 class="wp-block-heading" id="h-mechanisms-of-a-unique-plant">Mechanisms of a unique plant</h2>



"For centuries people have asked how and why this extraordinary plant sends its seeds into the world in such a violent way," said Dr. Chris Thorogood, Deputy Director and Head of Science at the <a href="https://obga.ox.ac.uk/" target="_blank" rel="noreferrer noopener">Oxford Botanic Garden</a>.



"Now, as a team of biologists and mathematicians, we’ve finally begun to unravel this great botanical enigma." 



Dr. Derek Moulton, professor of Applied Mathematics at the Oxford <a href="https://www.maths.ox.ac.uk" target="_blank" rel="noreferrer noopener">Mathematical Institute</a>, also participated in the research.



"The first time we inspected this plant in the Botanic Garden, the <a href="https://www.earth.com/news/one-third-of-europes-plants-at-risk-due-to-decline-in-seed-dispersers/" target="_blank" rel="noreferrer noopener">seed</a> launch was so fast that we weren’t sure that it had actually happened. It was very exciting to dig in and uncover the mechanism of this unique plant," Dr. Moulton explained.



<h2 class="wp-block-heading" id="h-beyond-seed-dispersal">Beyond seed dispersal</h2>



According to Dr. Finn Box, a Royal Society University Research Fellow at the University of Manchester, this study has implications beyond botany.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/squirting-cucumber_Ecballium-elaterium_squirting-seeds_UOxford_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/squirting-cucumber_Ecballium-elaterium_squirting-seeds_UOxford_1s.webp" alt="A still showing the jet ejected from a squirting cucumber, which carries its seeds distances of up to 10m away from the mother plant. Credit: Dominic Vella" class="wp-image-1951606"/></a><figcaption class="wp-element-caption">A still showing the jet ejected from a squirting cucumber, which carries its seeds distances of up to 10m away from the mother plant. Credit: Dominic Vella</figcaption></figure>



"This research offers potential applications in bio-inspired engineering and material science, particularly on-demand drug delivery systems, for instance microcapsules that eject nanoparticles where precise control of rapid, directional release is crucial," said Dr. Box.



<h2 class="wp-block-heading" id="h-the-squirting-cucumber-a-part-of-history">The squirting cucumber: A part of history</h2>



Ecballium elaterium, a member of the Cucurbitaceae family, which also includes melon, pumpkin, squash, and courgette, is native to the Mediterranean region where it is commonly regarded as a weed due to its effective seed-dispersal strategy.



This plant caught the attention of ancient Greeks and Romans alike, with naturalist Pliny the Elder describing its powerful <a href="https://www.earth.com/news/fossil-reveals-how-plants-use-winged-seeds-to-expand-their-habitats/" target="_blank" rel="noreferrer noopener">seed launch</a> centuries ago.



<h2 class="wp-block-heading" id="h-conservation-and-future-research">Conservation and future research</h2>



Given the squirting cucumber's extensive use as a model for understanding complex biological phenomena, conserving its natural habitats becomes imperative. This plant holds significant scientific and ecological value.



Future research could investigate the genetic underpinnings of its unique <a href="https://www.earth.com/news/insects-play-a-much-bigger-role-in-seed-dispersal-than-we-thought/" target="_blank" rel="noreferrer noopener">dispersal system</a>, linking it to other species within the Cucurbitaceae family to unravel shared evolutionary traits.



Additionally, exploring the potential for cross-disciplinary applications, from environmental management to biomimicry in engineering, could broaden our perspective on how such ecological marvels can benefit human society while preserving biodiversity.



The study is published in the journal <a href="https://www.pnas.org/doi/10.1073/pnas.2410420121" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



Video Credit: Dominic Vella



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How the 'squirting cucumber' squirts and the trigger that makes it happen

There is a fruit called the 'squirting cucumber' that fires its seeds like mini ballistic missiles. But how does it do this? Researchers seem to have solved this mystery -- a question that has baffled scientists for hundreds of years. The results of a recent study, based on a myriad of experiments, high-speed videography, image scrutiny, and advanced mathematical modeling, are published in the journal Proceedings of the National Academy of Sciences (PNAS). Understanding the squirting cucumber The squirting cucumber, or Ecballium elaterium, derives its name from...

Niger is one of the driest countries in sub-Saharan Africa, being plagued by frequent <a href="https://www.earth.com/news/europe-will-face-more-frequent-and-extreme-droughts/">droughts</a> that are considerably hindering its farming business, leading to dying crops and widespread famine. In an attempt to find cheap and sustainable solutions for reviving this country’s agriculture, a team of researchers from Niger, the United Kingdom, and Germany has assessed the benefits of using a mineral-rich, low-cost, and easily accessible fertilizer: sanitized human urine, which they renamed “Oga” (meaning “the boss” in the Igbo language) in order to avoid the negative connotations of the term “urine.”



For thousands of years, humans have known that urine is an excellent fertilizer for crops, since it contains many of the ingredients found in commercial fertilizers, such as phosphorous, nitrogen, and potassium. However, due to the squeamishness associated with utilizing urine to grow crops, its use has always been limited.&nbsp;



To test its effectiveness on large-scale farming, the researchers conducted a total of 159, 288, and 234 on-farm trials between 2014 and 2016. The farmers were divided into two groups - the first continued to use their traditional farming methods to grow their pearl millet grains (a common type of crops in the region), while the second group applied Oga (with or without animal manure) to their experimental plots, after being trained on how to safely use it. The results revealed that, over a period of three years, those who used Oga experienced an average 30 percent increase in their crop yields.&nbsp;



“Oga is a low risk, low financial input fertilizer option ready for dissemination on sandy Sahelian sites with low pearl millet yield level,” the study author wrote. Two years after these experiments, the scientists found that this method has significantly increased in popularity, with over one thousand farmers regularly using it to fertilize their crops.&nbsp;



Further research is needed to assess the benefits of using urine as a fertilizer in industrialized countries too. According to several scientists, switching from commercial fertilizers to urine could not only increase crop yields and reduce fossil fuel intensive resources needed to grow them, but also make our sanitation systems more sustainable.



“Millions and millions of dollars a year are spent trying to treat our waste before it goes into receiving waters for acceptable nitrogen and phosphorus criteria,” said Cara Beal, a researcher in Environmental Health at <a href="https://www.griffith.edu.au/">Griffith University</a> in Australia. “But if we can close that nutrient loop it’d be very sensible in terms of sustainability, the circular economy, and looking after our planet a little bit better,” she concluded.



The study is published in the journal <a href="https://link.springer.com/article/10.1007/s13593-021-00675-2#Abs1">Agronomy for Sustainable Development</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer&nbsp;&nbsp;

Human urine can effectively fertilize crops

Niger is one of the driest countries in sub-Saharan Africa,...

In a new study from <a href="https://en.wikipedia.org/wiki/Ural_Federal_University">Ural Federal University</a>, experts have demonstrated that flowers and tobacco can thrive on polluted land. These plants can adapt to copper in the soil by limiting the accumulation of the metal to the stem and leaves.&nbsp;



“Plants of the Asteraceae and Nightshade families, namely zinnia and tobacco, are copper-exclusive, their root system performs the function of copper accumulation,” explained study co-author Anastasia Tugbaeva. "Biotechnologies for maintaining and restoring components of natural and transformed biosystems", UrFU.&nbsp;



“Using zinnia as an example, we have shown for the first time that it can grow in copper-contaminated soils and even flower faster than in pure soils. That is, it can be used for landscaping areas, it will grow well. Tobacco, an important agricultural crop and useful fertilizer, also adapted to long-term exposure to copper in our experiments and grew comparable to control plants, despite the high content of copper in the substrate.”



For the investigation, the scientists recreated realistic levels of humidity and temperature0. They tested the effect of various concentrations of copper sulfate on growth, and analyzed various physiological characteristics of the plants.



“We conducted experiments for 20, 40, 60 days and used substrates in which the content of copper could even exceed its content in urban soils,” said Tugbaeva. “Under the influence of copper in the root and stem of plants, the expression of five genes responsible for the synthesis of phenolic compounds and lignin is enhanced. Lignin is one of the components of the plant cell wall, which makes it stronger. It is lignin that is the mechanism of plant adaptation, which limits the transfer of metals from the cell wall and the effects of metals on the intracellular structure of the plant.”



The study is published in the journal <a href="https://www.mdpi.com/journal/horticulturae">Horticulturae</a>.



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Tobacco and zinnia can thrive in polluted land

In a new study from Ural Federal University, experts have...

Trees are crucial components of ecosystems as they support biodiversity, help ecosystems function and provide important services, such as supplying food, sequestering <a href="https://www.earth.com/news/marshes-may-soon-flip-from-carbon-sinks-to-carbon-sources/">carbon</a> and contributing to the water cycle. Conserving tree diversity is thus a conservation priority for the functioning of natural ecosystems, for mitigating the effects of climate change, and for use by human societies across the world. Despite these important roles, many tree species are not adequately protected, have become rare and may even be at risk of disappearing altogether.



In a recent large-scale study, an international team of researchers headed by scientists from <a href="https://international.au.dk/">Aarhus University</a> in Denmark, has determined the worldwide distribution of more than 46,000 different species of trees, and estimated the extent to which this distribution falls within protected areas. In addition, they have assessed the intensity of human activity in the areas where the trees are found.&nbsp;



In order to do this, the researchers integrated five large databases, each containing millions of records of tree occurrence. They used these data to calculate the distribution of each tree species and then combined the distributions with a global map of the intensity of human activities. Lastly, they used the world database on protected areas (which includes information of more than 200,000 such areas) to map out the levels of protection for each tree species. Their results are published in the <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.



The findings highlight the fact that tree species are poorly protected in general, and some have no protection whatsoever. For the 46,752 tree species included in the study, an average of 50 percent of every tree species’ range falls in landscapes that have no protected areas. For 13.6 percent of the species, there is no protection at all, and most of these species have a limited distribution anyway, making them even more vulnerable.



Furthermore, the authors found that only 17 percent of the species considered are not under pressure from human activities. On average, 14.8 percent of the species are exposed to high or very high human pressure, while 68.5 percent are under moderate pressure.&nbsp;



“By compiling millions of registrations collected by researchers and citizens across the world and shared in open databases, we can calculate where it’s most important to preserve and restore natural areas in order to effectively protect biodiversity,” said Josep M. Serra-Diaz, who was previously affiliated with Aarhus University, and who is now an associate professor at AgroParisTech in France.



The researchers not only quantified the threat to tree species on a global scale, but they also suggested how this situation can be improved by means of the ambitious and smart designation of new protected natural areas.



“We did this by calculating the most suitable locations of potential protection areas if we are to safeguard tree species diversity, not only with regard to the coverage of species, but also with regard to their evolutionary and functional differences,” explained lead author Dr. Wen-Yong Guo, who started the work at the Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), but is now affiliated with East China Normal University in Shanghai.



The researchers have based their work on two existing plans for protecting the world's biodiversity:



<ul><li>According to the UN Strategic Plan for Biodiversity 2011-2020, adopted in 2010, at least 17 per cent of land areas, lakes and watercourses were to be protected by 2020.</li><li>Now, the 2050 Vision of Biodiversity is on the drawing board, and many interest groups are calling for the vision to be brought in line with the Half-Earth Project proposed by Harvard biologist, E.O. Wilson. The Half-Earth Project advocates protecting half the earth’s surface by no later than 2050.</li></ul>



The researchers calculate that, following the above two conservation scenarios, protection of the top 17 percent or the top 50 percent of tree priority areas would make a considerable difference in protecting global tree diversity. They find that protecting 17 percent and 50 percent of the high-priority areas for trees would increase the average protected proportion of each tree species’ range to 65.5 percent and 82.6 percent respectively. This would also leave far fewer species (2,151 and 2,010) completely unprotected.&nbsp;



“But taking a broad-brush approach or just designating the most convenient areas, for example uninhabited tundra and desert areas, will not have the desired effect. Based on our calculations in this study, we’ve identified the areas in which nature conservation makes most sense to safeguard global tree diversity. If we’re smart, protecting 17 per cent of land areas would mean that, on average, a tree species will have protected areas in 66 per cent of the landscapes in which it is found, as opposed to the current 50 per cent. With the Half-Earth vision, the proportion would be 83 per cent. Two-thirds of the tree species that are currently unprotected will have protected areas in the landscapes in which they’re found if we reach the 17 per cent target,” explained Jens-Christian Svenning, professor of Biology at Aarhus University and director of BIOCHANGE.



“But in order to achieve this, we have to look at the distribution of all species across the world, and establish protected areas so that they cover the species and their biological functions and evolutionary differences in the best possible way."



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Human activity and poor protection threaten tree diversity worldwide

Trees are crucial components of ecosystems as they support biodiversity,...

Photosynthesis, the conversion of <a href="https://www.earth.com/news/sunlight-helps-green-sea-turtles-with-tumors-recover/">sunlight</a> into plant material, is responsible for supporting all life on Earth outside of deep sea thermal environments and other such rarified examples. Now, scientists have found a way to create artificial photosynthesis, according to new research published in the journal <a href="https://www.nature.com/natfood/">Nature Food</a>.



Photosynthesis is a process that evolved billions of years ago. It created a habitable atmosphere, oxygenated the ocean and freshwater, and is the basis of our food chain. The scientists point out, however, traditional photosynthesis converts only one percent of the energy from sunlight into food. The new approach of artificial photosynthesis promises to be more efficient, if not quite as momentous.&nbsp;&nbsp;&nbsp;&nbsp;



“With our approach we sought to identify a new way of producing food that could break through the limits normally imposed by biological photosynthesis,” said study co-author Robert Jinkerson, a chemical and environmental engineer of <a href="https://www.ucr.edu/">University of California Riverside</a>.



The research outlines a way to create acetate, the main component of vinegar from water, carbon dioxide and electricity. Plants can then be fed the acetate while growing and producing food in the dark.&nbsp;



“Using a state-of-the-art two-step tandem CO2 electrolysis setup developed in our laboratory, we were able to achieve a high selectivity towards acetate that cannot be accessed through conventional CO2 electrolysis routes,” said Feng Jiao of the <a href="https://www.udel.edu/">University of Delaware</a>.



The researchers grew a wide array of different food organisms using this method, not only plants but also yeast, a fungi that often grows in the dark but in this case 18 times more efficiently. This means alcohol could be created with less input as from corn sugars or other traditional methods.&nbsp;



“We were able to grow food-producing organisms without any contributions from biological photosynthesis," said study co-author and doctoral candidate Elizabeth Hann. "Typically, these organisms are cultivated on sugars derived from plants or inputs derived from petroleum - which is a product of biological photosynthesis that took place millions of years ago. This technology is a more efficient method of turning solar energy into food, as compared to food production that relies on biological photosynthesis,”



The researchers hope their study allows us to grow food more efficiently, using less land or feeding an increasingly growing population using the same amount of land. They also imagine the possibility of using this method to cultivate crops on space ships or Mars in total darkness.&nbsp;&nbsp;



“Using artificial photosynthesis approaches to produce food could be a paradigm shift for how we feed people. By increasing the efficiency of food production, less land is needed, lessening the impact agriculture has on the environment. And for agriculture in non-traditional environments, like outer space, the increased energy efficiency could help feed more crew members with less inputs,” said Jinkerson.



The study is published in the journal <a href="https://www.nature.com/natfood/">Nature Food</a>.



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Artificial photosynthesis could help grow food more efficiently

Photosynthesis, the conversion of sunlight into plant material, is responsible...

Trees absorb carbon from the atmosphere, in the form of <a href="https://www.earth.com/news/new-carbon-sinks-may-be-appearing-in-the-arctic/">carbon</a> dioxide. This is then used during the process of photosynthesis to form organic carbon compounds, such as carbohydrates, in the leaves, branches, trunks and roots. A living tree is thus an important storage site for carbon that might otherwise be adding to the levels of carbon dioxide in the atmosphere. And a big, living tree is even more important.&nbsp;



However, when scientists attempt to understand the importance of the carbon storage currently provided by woody vegetation, and the effects of anthropogenic impacts on the carbon cycle, they are faced with the fact that there are no direct measurements of carbon cycling from the pre-industrial period. Furthermore, scientists do not really know how woody biomass has changed on Earth over recent millennia.



Without empirical data on changes in woody biomass spanning more than a few decades, scientists have to estimate and make assumptions when trying to model the effects of climate change. This can lead to uncertainties in predictions about the role of vegetation as a long-term carbon sink, and to inaccuracies when projecting future changes in the carbon and climate systems.&nbsp;



A new study, published today in the journal&nbsp;<a href="https://www.science.org/">Science</a>, seeks to fill this knowledge gap using the assemblages of fossil pollen in the soil as an indication of woody vegetation biomass in the past. Led by Ann Raiho of the <a href="https://www.umd.edu/">University of Maryland</a>’s Earth System Science Interdisciplinary Center (ESSIC), an international team of scientists used fossil pollen data as a proxy to reconstruct the natural pace and pattern of carbon storage in the forests of the Midwestern U.S. over the past 10,000 years. Their findings cast a new light on how landscapes can be managed to maximize carbon storage while also meeting conservation goals.&nbsp;



“We found that the forests in the Midwestern U.S. were expanding and getting bigger over the last 10,000 years,” said Raiho, a postdoctoral associate at ESSIC. “This tells us that the prehistoric baseline for understanding forests was wrong and that it’s important from a carbon sequestration perspective to preserve trees that grow larger and live longer.”



The research team, which also included researchers from the University of Notre Dame, University of California, Berkeley, University of Calgary and the U.S. Geological Survey, developed a Bayesian model that they named ReFAB (Reconstructing Forest Aboveground Biomass). This model estimates aboveground woody biomass based on a time-series of fossil pollen assemblages in sediments. The experts used ReFAB to reconstruct changes in woody biomass across a 600,000-plus kilometer area in the Upper Midwest of the U.S. over the last 10,000 years.&nbsp;



Their work painted a vivid picture of how forests have changed over this time. The researchers found that, after an initial postglacial decline, woody biomass nearly doubled during the last 8,000 years. This result differs substantially from prior reconstructions of forest biomass in eastern Canada, a finding they suggest may be due to differences in the forest species in the two regions.&nbsp;&nbsp;



Previous studies used simpler models that indicated little or no change in woody biomass over the last 6,000 years. ReFAB corrects this situation by accounting for temporal autocorrelation, uncertainty in sediment-dating, and uncertainty in the relationship between aboveground woody biomass and multivariate pollen data. Removing these uncertainties has allowed the researchers to understand past changes in vegetation at a finer scale, thereby uncovering trends that were previously not visible.&nbsp;



“We found that the ecology of forests matters for understanding the carbon cycle,” Raiho said. “The steady accumulation of carbon was driven by two separate ecological responses to regionally changing climate: the spread of forested biomes and the population expansion of high-biomass tree species within forests.”



The data from fossil pollen assemblages showed, sadly, that the woody biomass accumulated in the Midwestern forests over millennia took under two centuries to destroy. Industrial-era logging and agricultural clearance severely depleted this carbon accumulation. The researchers found that the decline in woody biomass in the studied region occurred at more than 10 times the rate of aboveground woody biomass change in any century over the last 10,000 years.



The researchers found that storage of carbon in woody biomass in the study area was driven by population expansions of high-biomass tree species, such as eastern hemlock and American beech. After these species became established, high-biomass forests were sustained in the study region for millennia. This discovery emphasizes the importance of preserving large trees when managing forests to mitigate the effects of climate change – large trees sequester considerable amounts of carbon.&nbsp;



“Forest management should emphasize sustaining populations of large trees,” Raiho said. “This has the potential to emulate the natural carbon sequestration processes and ultimately extend the timescales and magnitude at which terrestrial ecosystems will continue to buffer climate change by acting as a carbon sink.”



The research team will work in future with NASA’s Global Ecosystem Dynamics Investigation (GEDI), which will enable the protection of large trees by providing high resolution maps of the 3D structure of forests around the world. GEDI will expand existing knowledge about biomass magnitude, structure, and density. With this wealth of information, researchers will be able to predict the future of forests better.



“This work would not be possible without all of the people who collected and counted the fossil pollen data,” noted Raiho. “There were probably a hundred people over the last several decades who did all the field work. We used over 232 fossil pollen cores in this research. Thousands of hours went into the data collection. We used the Neotoma database to access this valuable data.”&nbsp;



Raiho and her team plan to use their pollen-based method of forest reconstruction to improve the simulation models used by the Intergovernmental Panel on Climate Change. This will enable scientists to understand better how climate change will impact Earth and its ecosystems in future.&nbsp;



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Big trees are crucial in stabilizing climate, new model predicts

Trees absorb carbon from the atmosphere, in the form of...

Researchers have found a way to alter <a href="https://www.earth.com/news/when-was-land-first-colonized-by-plants/">plant</a> proteins and create a fast test for dangerous chemicals, according to a new study published in the journal <a href="https://www.nature.com/nbt/">Nature Biotechnology</a>.



During droughts, plants produce a chemical called ABA which allows them to hold onto more water. Plants also create receptors that detect ABA. With a few small changes, the scientists showed that these ABA receptors can detect up to 20 chemicals. The tests could be used to look for illegal pesticides and dangerous synthetic cannabinoids.&nbsp;



“It would be transformative if we could develop rapid dipstick tests to know if a dangerous chemical, like a synthetic cannabinoid, is present. This new paper gives others a roadmap to doing that," said study co-author Sean Cutler, a plant cell biologist at <a href="https://www.ucr.edu/">UC Riverside</a>.



Synthetic cannabinoids, in particular, are created faster than regulations can keep up. These drugs are often dangerous, and even deadly. Fast tests could help regulators keep up with new products containing dangerous synthetic cannabinoids.&nbsp;&nbsp;



“Our system could be configured to detect lab-made cannabinoid variations as quickly as they appear on the market,” Cutler said.



The tests are also able to detect organophosphates, some of which (but not all) are illegal and dangerous pesticides. Being able to quickly identify the illegal pesticides would make testing water quality quicker.&nbsp;



To create these tests, the scientists used the nature of ABA to turn on receptors. When ABA interacts with receptors it can create many different reactions, such as glowing. Redesigning the receptors allows them to signal the presence of different chemicals. The scientists hope to expand this method to other types of chemicals as well.&nbsp;&nbsp;&nbsp;



“We take an enzyme that can glow in the right context and split it into two pieces. One piece on the switch, and the other on the protein it binds to,” Cutler said. “This trick of bringing two things together in the presence of a third chemical isn’t new. Our advance is showing we can reprogram the process to work with lots of different third chemicals.”



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

A plant-based test can detect dangerous chemicals

Researchers have found a way to alter plant proteins and...

The health benefits of eating a balanced, <a href="https://www.earth.com/news/plant-based-diets-reduce-the-risk-of-severe-covid-19/">plant-based diet</a> are being discussed more and more frequently in scientific literature, as the number of people embracing meat-free diets increases. In addition, plant protein is now used to create alternatives to meat that resemble anything from fried chicken strips to burger patties. The production of these substitutes does not harm any animals and gives rise to less greenhouse gases, which makes it more environmentally friendly. However, it is not known whether human cells absorb plant- and animal-derived proteins equally well.



In a study published by the <a href="https://www.acs.org/">American Chemical Society</a>, a team led by Osvaldo Campanella from The Ohio State University and Da Chen from the University of Idaho tested whether human cells can absorb similar amounts of digested proteins from a model meat alternative as they can from a piece of chicken. Previous research has shown that plant-based substitutes do not break down into their constituent molecules as easily as animal meats do during digestion, but the researchers aimed to test the extent of protein absorption as well.



Plant-based meat substitutes are manufactured to look and feel like animal meat. To achieve this, the plants are dehydrated and ground into powder form. They are mixed with spices, heated and moistened, before being pressed through an extruder to achieve the desired texture and appearance. They are usually considered to be healthier than animal meats because they contain less saturated fats but have a comparable level of protein.



The researchers made a model meat alternative out of soy and wheat gluten, using this extrusion process. Both these plant seeds are considered to be sources of quality proteins and when they are pressed out of an extruder they take on a texture that is very similar to that of chicken. When cut open, the material has long fibrous pieces inside, just like chicken.&nbsp;



Cooked pieces of chicken meat, and of the substitute plant-based product were then ground up in the lab and mixed with an enzyme that humans use to digest proteins. Proteins are very long molecules and enzyme action during digestion breaks them down into smaller fragments known as peptides.&nbsp;



The tests showed that meat-substitute peptides were less water-soluble than those from chicken, and they were also not absorbed as well by the human cells. This means that, despite the fact that plant foods may contain sufficient protein to start with, the proteins may not be broken down and absorbed adequately in the human digestive system.&nbsp;



The researchers say the next step is to identify other ingredients that could help facilitate the peptide uptake from plant-based meat substitutes, in the same way that vitamin C has been shown to boost iron uptake.&nbsp;



The research was funded by the College of Food, Agricultural, and Environmental Sciences at The Ohio State University. The study is published in the <a href="https://pubs.acs.org/journal/jafcau">Journal of Agricultural and Food Chemistry</a>.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Human cells absorb less protein from plant-based "meat"

The health benefits of eating a balanced, plant-based diet are...

Sunlit,Foggy,Forest,With,Black,Locust,Tree,On,Clearing

Clearing lands for agriculture can have negative implications for climate change. The removal of trees reduces the amount of carbon stored as biomass in the trees, as well as decreasing the amount of carbon dioxide removed from the atmosphere by photosynthesis. This means that carbon dioxide levels in the atmosphere increase when forests are cleared to make way for pastures. This is particularly severe when the forests are burned as part of the change in land use.&nbsp;



Researchers at the <a href="https://www.unh.edu/">University of New Hampshire</a> have now conducted a study to test whether leaving some trees behind when temperate forests are cleared in the northeastern United States can reduce some of the negative climate consequences. In the practice of silvopasture, trees are intentionally left behind in pastures where livestock graze. In addition, the stumps of trees that have been removed may also be left standing, increasing the amount of carbon remaining in the fields.&nbsp;



“We talked to a lot of farmers in the Northeast who are interested in the silvopasture approach but there aren’t a lot of data to help guide them through implementation, and responsible and strategic management,” said Alexandra Contosta, research assistant professor at UNH’s Earth Systems Research Center. “We wanted to see if silvopastures made a difference and found that there are benefits to this approach that could help both the farmer and the planet.”



The researchers set up experimental land plots in two locations, in New Hampshire and New York. In both locations, forests have regenerated following a period of forest clearing, intensive&nbsp;<a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/agricultural-management">agricultural management</a>, and subsequent farm abandonment, such that&nbsp;<a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/secondary-forests">secondary forests</a>&nbsp;currently comprise 60–80 percent of the land base. In both experiments, they hypothesized that, compared to managed cool-season pasture, forest conversion to silvopasture would moderate changes in surface temperature,&nbsp;<a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/greenhouse-soils">soil greenhouse</a>&nbsp;gas emissions, as well as in <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/soil-carbon">soil carbon</a>&nbsp;and nutrient losses.



At both locations, land was divided into three plots (also called treatments); one plot was covered with secondary forest, one plot was cleared of forest and open pasture was planted, and in the third plot, silvopasture was established. In this last experimental treatment, trees were thinned by 50 to 60 percent and tree stumps were left in place. Orchard grass, white clover and other forage species were planted, after which either dairy or beef cows were introduced.&nbsp;



The researchers set up meteorological stations in each of the experimental areas, and monitored emissions of the greenhouse gases carbon dioxide and nitrous oxide. They also measured soil temperature and moisture, as well as the carbon and nitrogen contents of the soil.&nbsp;&nbsp;



The results, published in the journal <a href="https://www.sciencedirect.com/journal/agriculture-ecosystems-and-environment">Agriculture, Ecosystems &amp; Environment</a>, revealed that near-surface air and soil temperatures were highest in the converted pasture plots, lowest in secondary forest areas, and intermediate in the converted silvopasture treatment.&nbsp;<a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/soil-respiration">Soil carbon dioxide levels showed a similar trend, with elevated soil </a>CO2 in open pastures and lower levels in secondary forests and converted silvopasture treatments. They did not find any differences in carbon storage in the soil between different land use treatments.&nbsp;



Compared to a completely cleared, tree-less, open pasture, the integrated silvopasture treatment released lower levels of carbon dioxide and nitrous oxide, thus offering a possible alternative for farmers who are concerned about the climate consequences of land use change.&nbsp;



According to the researchers their findings suggest that silvopasture may offer a biogeochemical “middle ground” between intact secondary forests and managed open fields, retaining the climate benefits of forests while enabling expansion of the&nbsp;<a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/arable-land">agricultural land</a>&nbsp;base.



They feel it is important to understand the climate impacts of forest conversion to open pasture or silvopasture in order to anticipate the climate consequences of potential future land use practices, both across the northeastern US and in other temperate forest regions globally.&nbsp;&nbsp;



“New England has a lot of trees which can reduce our options for agriculture and our ability to produce our own food,” said Contosta. “So, what is exciting about this study is that it shows silvopasture could be a viable alternative that is also more climate conscious.”



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Leaving trees standing could reduce climate consequences

Clearing lands for agriculture can have negative implications for climate...

Spring,Growing,Flowers,And,Nature,That,Comes,Alive

A team of biologists led by Dr. Sven Gould has been looking at the colonization of land by plants some 500 million years ago. The results of this overview study were published by lead author Dr. Mona Schreiber in the journal <a href="https://www.cell.com/trends/plant-science/home">Trends in Plant Science</a>.



Although the <a href="https://www.earth.com/news/earths-magnetic-field-is-not-likely-to-reverse-any-time-soon/">Earth</a> is roughly 4.5 billion years old, the first few hundred million years of its existence the planet was a molten ball too hot to be amiable to much life. Eventually oceans and land masses formed when the earth cooled, allowing the basis of our modern planet.  



It was not only the heat that kept the planet sterile though. Weaker magnetic fields allowed radiation to pour in from space and a thin atmosphere allowed bombardment of UV light.  



About 500 million years ago, a revolution took place and plants invaded dry land. With plants spreading from the oceans to terra firma, the atmosphere was radically improved with the fixing of carbon from the atmosphere and releasing oxygen into the same atmosphere.&nbsp;



One of the first plants to make its way from water to land was a streptophyte alga, first creating a green space where animals could possibly make a home. Eventually, these early plants were supplanted in time with more modern flowering plants. Indeed, today flowering plants make up 90% of all terrestrial plant species.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



“Human beings, which have but a brief history compared to plants, are indeed responsible in their own right for significant changes to the planet and its climate," said Dr. Gould. 



"The extreme rapidity of those changes poses a major problem, as nature has little insufficient time to adapt. The pace of human-caused change accelerated when man developed agriculture and animal husbandry, which led to steady population growth and the clearing of ever more land for farming.”



The researchers are studying the genetics of plants that first made their way to land in an effort to understand plant mechanisms for making hostile environments hospitable - something that is becoming increasingly relevant. The research may help with crop development, which is increasingly threatened by climate change.



---



By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

When was land first colonized by plants?

A team of biologists led by Dr. Sven Gould has...

Coastal ecosystems such as <a href="https://www.earth.com/news/diverse-mangrove-forests-have-higher-carbon-storage-capacity/">mangrove forests</a> and coral reefs act as natural barriers to storm surges and massive waves, significantly reducing flood damage to people and properties. However, in many regions of the world, the degradation of coastal wetlands and reefs has reduced their ability to protect coastlines from flooding and erosion. Although strategies for restoring these important ecosystems exist, funding for such restoration projects is often hard to find.&nbsp;



A new study led by the <a href="https://www.ucsc.edu/">University of California, Santa Cruz</a> has found that restoration of mangroves and coral reefs can be a cost-effective solution for coastal flood reduction in over 20 countries across the Caribbean. By using methods drawn from the risk and insurance industry, the experts provided a rigorous valuation of these natural defenses, showing that the benefits from reduced flood damage could exceed the costs of restoration. These findings suggest new opportunities to support restoration project with funding from sources that support hazard mitigation, disaster recovery, and climate adaptation, including the <a href="https://www.fema.gov/">U.S. Federal Emergency Management Agency</a> (FEMA).&nbsp;



“We identify a number of funding sources that have traditionally supported artificial ‘gray infrastructure,’ such as concrete sea walls, and that could be applied to nature-based solutions,” said study lead author Michael Beck, an expert in coastal resilience at UC Santa Cruz. “Funding for artificial infrastructure such as seawalls can be redirected to natural defenses, which provide multiple benefits beyond coastal protection.”



According to Professor Beck and his colleagues, global spending on disaster recovery is currently over 100 times larger than the spending on conservation. “Recovery funding will grow as climate change increases the impacts from storms, and environmental funding will likely shrink as national budgets are strained by natural disasters,” he said.



“There are opportunities to align conservation, flood risk reduction, and climate adaptation to reduce storm risks. There are many places across the Caribbean where habitat restoration for risk reduction could be cost-effective, and these values open significant opportunities to pay for their needed restoration,” the authors concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1016/j.ecoser.2022.101440">Ecosystem Services</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer&nbsp;&nbsp;

Mangrove restoration efficiently reduces flood damage

Coastal ecosystems such as mangrove forests and coral reefs act...

A new botanical survey of southwest Ohio conducted by the <a href="https://www.uc.edu/">University of Cincinnati</a> (UC) has found that <a href="https://www.earth.com/news/managing-invasive-species-can-improve-climate-resilience/">invasive species</a> introduced in the United States over the past century are gradually crowding out many native plants, threatening a large variety of ecosystems that depend upon them. These non-native species include plants such as the Amur honeysuckle, the porcelain berry, the winged euonymus, the European buckthorn, or the Oriental bittersweet.



By focusing on undeveloped parts of cemeteries, banks of the Mill Creek, and public parks that have remained protected from development during the past two centuries, the scientists found that many species that were initially introduced as ornamental plants have now spread and are flourishing in the wild.&nbsp;



One of the most invasive species is the Amur honeysuckle, a woody shrub originating from Asia, which has delicate white flowers in the spring and red berries in the fall. According to a survey from 1961, this plant started to grow in some parts of Hamilton County, but had not yet spread in the wild in other places in Ohio. Now, it is found everywhere in the state, crowding out virtually all other low-lying vegetation.&nbsp;



“Amur honeysuckle is now the most abundant woody plant in Hamilton County. It has escaped into the wild and is propagating on its own,” said study lead author Denis Conover, a professor of Biology at UC. “One bush can produce thousands of seeds that get dispersed by birds and mammals.”



According to Professor Conover, in places where these introduced plants are found, there is often less biodiversity to support wildlife and the native food chains. Once they take hold, eradicating them is labor-intensive, time consuming, and expensive.



“Native plants just don’t have a chance. Everything that depends on the native plants — insects, birds — can be lost,” he said. “When they introduce nonnative plants to the United States, they can also import fungal diseases that can wipe out native trees, which is what happened with the American chestnut.”



Besides the Amur honeysuckle, the researchers found dozens of other examples of foreign species that have taken root in southwest Ohio’s forests, including the tree of heaven, the common privet, the lesser periwinkle, the Norway maple, the Amur cork tree, and the white poplar, as well as various herbaceous species such as the lesser celandine, the garlic mustard, and the Japanese knotweed.



“The spread of nonnative invasive species into wooded natural areas in southwestern Ohio threatens the continued survival of native flora and fauna. Efforts by park managers and volunteers to control invasive plant species has become a major part of their duties. This effort will be required in perpetuity and will be at great expense both monetarily and timewise due to collateral damage to native plants, wildlife, and humans caused by the extensive use of herbicides, chainsaws, and other mechanical equipment,” the authors concluded.



The study is published in the journal <a href="http://dx.doi.org/10.3368/er.40.2.94">Ecological Restoration</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer&nbsp;&nbsp;&nbsp;

Invasive plants are taking over Ohio’s forests

A new botanical survey of southwest Ohio conducted by the...

Analysis of a charred <a href="https://www.earth.com/news/wooden-shipwrecks-have-become-diverse-microbial-habitats/">wood</a> assemblage from an archaeological site at Tel Tsaf in the Jordan Valley, Israel, has revealed the presence of burned wood from 16 different species of trees, including olive (Olea europea) and fig (Ficus carica) trees. The researchers have proposed that since the olive did not grow naturally in the Jordan Valley, the inhabitants must have planted the trees intentionally about 7,000 years ago. This would represent the earliest example of olive domestication in the Mediterranean and in the world.



The groundbreaking study was led by Dr. Dafna Langgut of the&nbsp;Jacob M. Alkow Department of Archaeology &amp; Ancient Near Eastern Cultures and the Steinhardt Museum of Natural History at <a href="https://english.tau.ac.il/">Tel Aviv University</a>. The charcoal remnants were found in the archaeological excavation directed by Prof. Yosef Garfinkel of the Institute of Archaeology at the Hebrew University. The findings were published in the journal&nbsp;<a href="https://www.nature.com/srep/">Scientific Reports</a>.&nbsp;



Tel Tsaf is located in the Central Jordan Valley, 32.5&nbsp;km south of the Sea of Galilee, on the edge of the Jordan River’s west bank. Its chronology indicates that occupation began in the last quarter of the 8th millennium BP and ended the first quarter of the 7th millennium BP. The remains of the stone settlements include courtyards, dwellings and large silos that would have been able to store 20–30 tons of produce. The large capacity of these silos would have exceeded the needs of the inhabitants, and indicate successful agriculture and a complex economic system of surplus and wealth accumulation.



The seeds found at the site include those from crop plants such as barley, wheat, lentil and pea. However, the researchers were particularly interested in the presence of charred wood assemblages from various locations around the site. In total, 662 samples of charred wood were analyzed, most of which turned out to be from Quercus ithaburensis&nbsp;(Mt. Tabor oak, 39.8 percent) and from Tamarix&nbsp;spp. (22.3 percent). The researchers identified the species using microscopic investigation of the anatomical features of the wood (e.g., vessels and their arrangements, size and arrangement of rays, and the patterns of parenchyma and fibers).&nbsp;



The wood of olive trees (6.4 percent) and fig trees (6.5 percent) was also present in the assemblages. “It is well-accepted, based on archaeobotanical research, that the existence of wood and/or its charcoal remains from fruit trees at a site point to their horticulture in its vicinity," noted the study authors.&nbsp;



A few specimens of olive pips have also been collected at Tel Tsaf, giving evidence that there were olive orchards nearby the site. Interestingly, the Central Jordan Valley is located outside the natural distribution area of wild olives, and this appears to have been true in the 7th millennium BP as well. The olives must, therefore, have been planted there by the local inhabitants.&nbsp;



“Trees, even when burned down to charcoal, can be identified by their anatomic structure. Wood was the ‘plastic’ of the ancient world. It was used for construction, for making tools and furniture, and as a source of energy. That's why identifying tree remnants found at archaeological sites, such as charcoal from hearths, is a key to understanding what kinds of trees grew in the natural environment at the time, and when humans began to cultivate fruit trees,” explained Dr. Langgut.



The samples of charred fig tree involved specifically the young branches, a part that is not usually used for construction or fuel. The branches were carbon dated to between 6960 and 6860 years before present. The researchers propose that the presence of these young branches was due to the fact that they had been pruned off larger trees in order to promote fruit production. This would also be evidence of horticultural practices involving fig orchards. Both figs and olives can be preserved and transported, and would have been useful commodities for trade.



According to Dr. Langgut, olive trees grow in the wild in the land of Israel, but they do not grow in the Jordan Valley. "This means that someone brought them there intentionally – took the knowledge and the plant itself to a place that is outside its natural habitat. In archaeobotany, this is considered indisputable proof of domestication, which means that we have here the earliest evidence of the olive's domestication anywhere in the world.”&nbsp;



“I also identified many remnants of young fig branches. The fig tree did grow naturally in the Jordan Valley, but its branches had little value as either firewood or raw materials for tools or furniture, so people had no reason to gather large quantities and bring them to the village. Apparently, these fig branches resulted from pruning, a method still used today to increase the yield of fruit trees.”



The evidence of fruit tree cultivation, along with large silos and dwellings at Tel Tsaf, indicate that the inhabitants were wealthy and had considerable material means. The presence of other, exotic items such as obsidian, rare-mineral beads, complex pottery, and a copper awl, all support the interpretation that the society was wealthy and probably engaged in trade.&nbsp;



“Storage capacities [at Tel Tsaf] were up to 20 times greater than any single family's calorie consumption, so clearly these were caches for storing great wealth," said Professor Yosef Garfinkel, who headed the archaeological dig. "The wealth of the village was manifested in the production of elaborate pottery, painted with remarkable skill. In addition, we found articles brought from afar: pottery of the Ubaid culture from Mesopotamia, obsidian from Anatolia, a copper awl from the Caucasus, and more.”



Dr. Langgut and Professor Garfinkel were not surprised to discover that the inhabitants of Tel Tsaf were the first in the world to intentionally grow olive and fig groves, since growing fruit trees is evidence of luxury, and this site is known to have been exceptionally wealthy.&nbsp;



“The domestication of fruit trees is a process that takes many years, and therefore befits a society of plenty, rather than one that struggles to survive," said Dr. Langgut. "Trees give fruit only 3–4 years after being planted. Since groves of fruit trees require a substantial initial investment, and then live on for a long time, they have great economic and social significance in terms of owning land and bequeathing it to future generations – procedures suggesting the beginnings of a complex society.”



“Moreover, it's quite possible that the residents of Tel Tsaf traded in products derived from the fruit trees, such as olives, olive oil, and dried figs, which have a long shelf life. Such products may have enabled long-distance trade that led to the accumulation of material wealth, and possibly even taxation – initial steps in turning the locals into a society with a socio-economic hierarchy supported by an administrative system."



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Olives were first cultivated 7,000 years ago

Analysis of a charred wood assemblage from an archaeological site...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Santiago, Chile in South America

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Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Interactive map of the universe includes 200,000 galaxies

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



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Lesotho: Africa's "Kingdom in the Sky"

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The province of Zaragoza in northeast Spain

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The Pyrenees Mountains in southwest Europe

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Two distant planets may be "water worlds"

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The history of Mars is much more complex than we thought

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Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Cavefish are healthy despite their sedentary lifestyle

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Satellites capture the world's biggest and fastest waves

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes why satellite images and measurements of our planet have become "essential to our survival, offering a new outlook of our world."&nbsp;



Rising sea levels pose one of the biggest societal threats associated with climate change. According to ESA, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.



"Unbeknown to many, the island of Crete, Greece, plays an important role in the Copernicus satellite altimetry constellation and on an international stage," reports ESA.



"Satellite altimetry data have to be continuously monitored at the ESA’s Permanent Facility for Altimetry Calibration where different techniques have pioneered the use of transponders to provide the best measurements to validate satellite altimeters in space soon after launch."



Dr. Craig Donlon explains that, by understanding planet Earth through satellite measurements, we are able to find evidence of change.&nbsp;



Video Credit: European Space Agency&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Satellites have become essential to our survival

[sendtonews key="761m2QQvR1-2035772-12187" type="single"] Today’s Video of the Day from the...