Climate change is no longer a future threat -- it is the reality we are now living in. The hustle and bustle of human activities has caused carbon dioxide (CO2) levels to surge in our atmosphere, triggering a notable increase in the global average surface temperature.



This isn't just an issue for scientists and environmentalists to address - climate change is something everyone needs to understand because it directly threatens our crops and food security.



<h2 class="wp-block-heading" id="h-crop-yields-and-climate-change">Crop yields and climate change</h2>



A recent study was carried out by a group of researchers at Banaras Hindu University (BHU) in India. Driven by concerns about the impact of environmental factors on global food security, the team set out to investigate this <a href="https://www.earth.com/news/plants-defy-climate-change-through-acclimation/" target="_blank" rel="noreferrer noopener">complex problem</a>.



The goal was to predict how climate variables influence the crop yields that feed our expanding population.



<h2 class="wp-block-heading" id="h-model-to-capture-nonlinear-relationships">Model to capture nonlinear relationships </h2>



The researchers didn't just base their work on assumptions or approximations. 



Instead, they meticulously crafted a mathematical model to capture the nonlinear relationships between CO2, temperature, human population, and <a href="https://www.earth.com/news/how-plant-diversity-can-help-combat-climate-change/" target="_blank" rel="noreferrer noopener">crop growth</a>.



Why the emphasis on "nonlinear" relationships? Because our natural world doesn't play by straight-line rules. 



Complex and often chaotic, ecological systems dance in a pattern that's more of a spiral than a straight line - another factor the researchers took into account when designing their model.



<h2 class="wp-block-heading" id="h-climate-change-limits-crop-growth">Climate change limits crop growth</h2>



"We've considered how the rising CO2 levels will initially boost crop growth through the 'CO2 fertilization effect,’ but once temperatures exceed a critical threshold, the heat stress will reduce yields," said A.K. Misra, one of the scientists on the project from <a href="https://www.bhu.ac.in/Site/Home/1_2_16_Main-Site" target="_blank" rel="noreferrer noopener">BHU</a>.



"A non-autonomous system with seasonal variations reveals complex behaviors like periodic oscillations and chaos - and highlights the unpredictability of crop responses to rising temperatures."



<h2 class="wp-block-heading" id="h-double-edged-sword-of-rising-co-2-levels">Double-edged sword of rising CO2 levels</h2>



While it's true that an abundance of CO2 can initially boost crop growth, the broader picture isn't as optimistic.



As Misra mentioned, the challenge lies in the rising temperatures that accompany the elevation in atmospheric CO2 levels.



So, while we might see a short-term win for crops, the long-term outlook is decidedly more concerning. The takeaway? We need to understand when to say "when" in terms of CO2 emissions.



<h2 class="wp-block-heading" id="h-alarm-bells-for-crop-survival">Alarm bells for crop survival</h2>



It turns out that individual crop varieties <a href="https://www.earth.com/news/climate-change-is-happening-too-fast-for-some-species-to-adapt/" target="_blank" rel="noreferrer noopener">react differently</a> to these changing climatic conditions.



"Our findings reveal a critical threshold for anthropogenic CO2 emission, beyond which crop yield starts to decrease significantly. It depends on the cultivated crop varieties - different varieties exhibit varying responses, so the results may not apply uniformly across all crops," Misra explained.



<h2 class="wp-block-heading" id="h-heat-tolerant-crops-to-tackle-climate-change">Heat-tolerant crops to tackle climate change</h2>



However, it's not all doom and gloom. The researchers also unveiled a promising strategy to combat these climate-change-induced crop losses - the development of crop varieties with higher temperature tolerance.



By creating crops that can withstand warmer temperatures, farmers can better adapt to changing environmental conditions, thus protecting the crop yield and ensuring food security.



Perhaps the most shocking revelation from the study was how minute increases in temperature could have sweeping impacts on crop yields. It’s a stark reminder that the issue of climate change cannot be taken lightly.



<h2 class="wp-block-heading" id="h-chaotic-behavior-of-crop-systems">Chaotic behavior of crop systems</h2>



"By identifying critical temperature thresholds, we get insights into when crop yields may begin to decline, which will guide policymakers in making more beneficial strategies," Misra noted. 



He further suggested that breeding or using crops with increased temperature tolerance should be considered as a strategy to maintain productivity under elevated <a href="https://www.earth.com/news/climate-change-is-destabilizing-ant-plant-relationships/" target="_blank" rel="noreferrer noopener">CO2 levels</a>.



Misra and his team believe that understanding the chaotic behavior of crop systems will help improve yield predictions and inform adaptive farming practices. This knowledge will be pivotal in managing seasonal and climatic variability.



<h2 class="wp-block-heading" id="h-future-research-directions">Future research directions</h2>



The team plans to refine their model to include more variables like insect population sizes, water availability, soil quality, and nutrient levels, which also impact crop yields under climate change.



"Further experimental validation with real-world data will help calibrate our model more accurately, while the development of region-specific models will enable localized predictions and strategies," concluded Misra.



The study is published in <a href="https://pubs.aip.org/aip/cha/article-abstract/34/11/113134/3322281/Impact-of-elevated-carbon-dioxide-and-temperature?redirectedFrom=fulltext" target="_blank" rel="noreferrer noopener">Chaos: An Interdisciplinary Journal of Nonlinear Science</a>.



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Predicting the response of crops to climate change is crucial, but can we do it?

Climate change is no longer a future threat -- it is the reality we are now living in. The hustle and bustle of human activities has caused carbon dioxide (CO2) levels to surge in our atmosphere, triggering a notable increase in the global average surface temperature. This isn't just an issue for scientists and environmentalists to address - climate change is something everyone needs to understand because it directly threatens our crops and food security. Crop yields and climate change A recent study was carried out by...

New research from <a href="https://www.rutgers.edu/">Rutgers University</a> shows that tidal marshes - the ecosystem where freshwater meets the ocean - are likely to be flooded by rising sea levels in New Jersey. The study, including potential solutions to save the marshes, was published in the journal <a href="https://cdnsciencepub.com/journal/anc">Anthropocene Coasts</a>.&nbsp;



Study lead author Judith Weis explained how a marsh is destroyed by sea level rise, “Faced with sea level rise, a marsh has two options - it can either increase its elevation at a rate equal to that of sea level rise or it can migrate inland. Otherwise, it will be submerged and drown.”



Marshes are an important habitat for a collection of birds, fishes, crabs and other invertebrates. Tidal marshes are also valuable buffer zones against storms and absorb toxic pollutants, acting as a type of natural filter.&nbsp;



When researchers looked at tidal marshes in New Jersey, they found that half of those investigated were being lost to erosion due to sea level rise. The scientists found that some of this loss was being compensated by the marshes “marching” inland as the sea rose.



Unfortunately, the marsh moving inland sometimes kills trees by exposing them to salt water. Furthermore, such movement isn’t possible everywhere - especially in developed areas.&nbsp;



The researchers also found something unexpected. The tidal marshes moving most substantially away from rising sea levels were occupied by the invasive common reed (Phragmites australis). Although the reed reduces plant diversity, it allows marshes to move. When they die, the reeds accumulate sediment which raises the marsh level. This acts as a better buffer to flooding than natural grasses.&nbsp;



“Some reeds should be left on the marsh surface to give the marsh a better chance of keeping up with sea level rise," said Weis. "This will be controversial and likely opposed by many marsh managers, which will require a revolutionary change in marsh management.”



The study is published in the journal <a href="https://cdnsciencepub.com/journal/anc">Anthropocene Coasts</a>.



---



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

New Jersey's tidal marshes are vanishing

New research from Rutgers University shows that tidal marshes -...

A new study led by the <a href="https://illinois.edu/">University of Illinois at Urbana-Champaign</a> has found that sweet corn, when planted at high densities, has steadily increased in <a href="https://www.earth.com/news/cleaner-air-improves-corn-and-soybean-yields/">yield</a> over the past 80 years. This historical analysis highlights the importance of planting modern density-tolerant species of corn at their optimal densities, and suggests opportunities to further improve their density tolerance.



“Over time, steady improvement in plant density tolerance has contributed greatly to genetic yield gain in field corn. While our recent research indicates plant density tolerance in modern sweet corn hybrids could be exploited to improve yield, historical changes in plant density tolerance in sweet corn were unknown,” explained study lead author Daljeet Dhaliwal, a doctoral student in the&nbsp;<a href="https://cropsciences.illinois.edu/">Department of Crop Sciences</a>&nbsp;at the University Illinois.



Together with Marty Williams, an adjunct professor of ecology, Dhaliwal tested sweet corn crowding tolerance in hybrids dating from 1934 to 2014. They found that, when grown at high densities, the marketable ear mass increased by a total of 2.85 tons per acre during this period, and an average of 0.36 tons per decade.



The researchers grew one or more hybrids representing each decade at both low (4,000 plants per acre) and high densities (32,000 plants per acre) over the course of three years. Next, they measured key harvest metrics, such as marketable ear mass, crate yield, and recovery. They discovered that the marketable ear mass and the crate yield improved in hybrids grown under high densities. Thus, modern hybrids appear particularly suited for growth at high densities.



“Plant architecture has become more compact. Plants are putting fewer resources into vegetative tissue, so there's less fresh biomass and fewer tillers. That means modern plants are really suitable for growing at higher densities. There's less interference, right? But when you plant them at low densities where there is no competition, these plants are not out-yielding older hybrids,” explained Dhaliwal.



On the other hand, the scientists found that fresh kernel mass and recovery didn’t change much over time.&nbsp;



“No improvement over 80 years suggests a potential breeding objective. What if we could improve recovery?" said Williams. "Until the last decade, few sweet corn breeding programs were measuring recovery. Instead, breeders focused on other important traits, particularly eating quality and disease resistance. But now that we know how little recovery has improved, perhaps it’s worth targeting."



The study is published in the journal <a href="https://www.frontiersin.org/articles/10.3389/fpls.2021.707852/full">Frontiers in Plant Science</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

Planting sweet corn at high densities improves yield

A new study led by the University of Illinois at...

House,Plants,Display.,Indoor,Plants,In,Window

According to a new study commissioned by the organization <a href="https://www.thejoyofplants.co.uk/">The Joy of Plants</a> for the launch of the <a href="https://www.thejoyofplants.co.uk/houseplant-hideout-gives-londoners-slice-plant-paradise">Houseplant Hideout</a> in London, people feel happier and more productive when surrounded by houseplants. These benefits might arise from the soothing effects of the green color, combined with the opportunity to provide care for living beings.



A study of 2,000 British adults found that the perfect working environment should include a selection of plants, bright colors, and decorative stationery. Over half of the survey participants said they feel more productive when surrounded by plants, while two-thirds claimed that plants have a positive impact on their <a href="https://www.earth.com/news/boys-who-play-sports-as-young-children-have-better-mental-health/">mental health</a>.&nbsp;



Almost three-quarters of the participants had an average of five houseplants in their homes. Many of these individuals expressed that the plants have a calming effect (45 percent), add color to the environment (44 percent), and improve the quality of indoor air (39 percent). Some of them even speak to their houseplants (23 percent), or put music on for them (20 percent).



“As a botanist, I am fascinated by the growing body of scientific evidence which supports what this new consumer research highlights - that being around plants can measurably improve both mental and physical health,” said study lead author James Wong, an ethnobotanist, presenter, and garden designer. “The effect of houseplants seems to work on a number of inter-related levels and the best thing is that the only side effect of this therapy is having a beautiful home.”



According to Wong, the rich green color characterizing houseplants can reduce stress levels and pain, and improve feelings of self-worth. Furthermore, having a living thing to nurture and focus on could act in a similar way to mindfulness exercises, and relieve feelings of anxiety and tension.



“The research stats prove what we’ve often thought - having plants in the home helps moods and productivity,” a spokesman for the Joy of Plants said. “It’s no secret being outdoors and surrounded by nature often helps improve mental health and decrease stress levels and it’s great to see that bringing the outdoors in has a similar effect.”



“Particularly when working, which many of us have been doing from home the past year and a half, people clearly like to have a plant nearby, not only for productivity but also to boost their mood,” he concluded.



The Houseplant Hideout in Shoreditch in London is open between 7th and 10th October.



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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

Houseplants improve mood and productivity

According to a new study commissioned by the organization The...

Research from the <a href="https://www.bristol.ac.uk/">University of Bristol</a> has revealed that birds can learn to avoid plants that host toxic insects. While it was known that young <a href="https://www.earth.com/news/brood-parasites-target-host-birds-with-small-eyes/">birds</a> easily learn to recognize the coloration and markings found on dangerous prey, the new study is the first to show that birds also remember the plants that harbor them.&nbsp;



“Our findings suggest that insect herbivores that specialize on easily recognizable host plants gain enhanced protection from predation, independent of their warning signal alone," said study co-author Professor Nick Scott-Samuel.



To investigate, the scientists placed artificial, brightly colored cinnabar caterpillars alongside non-signalling fake caterpillars on two types of plants. The experts used ragwort, the natural host of cinnabar caterpillars, and bramble, a non-toxic plant that is not a natural host of the cinnabar. When foraging birds were abundant, both target types survived better on ragwort compared to bramble.



Study lead author Callum McLellan, a graduate student at the School of Biological Sciences, noted that Cinnabar caterpillars have a recognizable yellow and black appearance. "They also only live and feed on ragwort, which itself has distinctive yellow flowers," said McLellan.



The researchers wanted to learn whether birds use these bright yellow flowers as a cue to avoid ragwort. They removed the spikes of flowers from the ragwort and pinned them onto the bramble.



This experiment revealed that only the non-signaling targets survived better on plants with ragwort flowers, compared to the same plant type without the flowers. Meanwhile, the cinnabar lookalikes survived equally across all of the plants.&nbsp;



"We have shown that birds learn that the ragwort flowers are a cue for danger, so can avoid going anywhere near toxic prey. It’s more efficient to avoid the whole plant than make decisions about individual caterpillars," explained McLellan.



“Interestingly, any camouflaged caterpillars living on the same plant also benefit from birds’ learnt wariness of ragwort, despite being perfectly good to eat," said Professor Innes Cuthill, who devised the study.



“Our results provide the opening to a brand-new discussion on how toxicity initially evolved in insect prey, and the conditions under which warning coloration is, or is not, favored.”



The study is published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</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

Birds can recognize plants that host toxic insects

Research from the University of Bristol has revealed that birds...

Green vegetables are commonly associated as an essential part of a healthy <a href="https://www.earth.com/news/obesity-and-high-fat-diets-may-contribute-to-hair-loss/">diet</a>, but new research from the <a href="https://www.usf.edu/">University of South Florida</a> has found that basil and other herbs may protect the brain against Alzheimer’s disease pathology.



The study was based around investigation of the gut microbiome, discovering within it a sense mechanism that explains why fenchol - a natural compound abundant in basil plants - can reduce brain neurotoxicity that leads to Alzheimer’s.



However, the correlation is not direct. The study’s results first demonstrated that short-chain fatty acids (SCFAs), metabolites produced in the gut microbiome that provide nutrition for colon cells, also contribute to brain health. SCFA activity is largely reduced in older patients with Alzheimers.



The protective effects are produced when the short-chain fatty acids bind to and activate the fatty acid receptor 2 (FFAR2). The researchers have discovered that the fenchol found in basil is excellent at triggering this biological communication.



“Our study is the first to discover that stimulation of the FFAR2 sensing mechanism by these microbial metabolites (SCFAs) can be beneficial in protecting brain cells against the toxic accumulation of the amyloid-beta (Aβ) protein associated with Alzheimer’s disease,” said principal investigator Hariom Yadav.



The fenchol-rich basil plant was discovered as an appropriate candidate for mimicking the beneficial signaling through a large-scale screening process concerning over 144,000 natural compounds. The results narrowed the range down to just 15 leading candidates, with fenchol showing the highest amount of potential for the stimulation of FFAR signalling.



Upon discovering this, the researchers closely examined the compound, discovering that it decreases senescent neuronal cells (otherwise known as ‘zombie cells’) that are commonly located in brains with Alzheimers. These are cells that build up in aging organs to create an inflammatory environment, sending stress signals that ultimately spread the characteristic to otherwise healthy cells.



“Fenchol actually affects the two related mechanisms of senescence and proteolysis,” explained Yadav. “It reduces the formation of half-dead zombie neuronal cells and also increases the degradation of (nonfunctioning) Aβ, so that amyloid protein is cleared from the brain much faster.”



The discovery shows great potential for the future prevention of Alzheimers, but further research is still required. It is unclear whether concentrated doses of fenchol should be administered as a pill, or if regular consumption of plants such as basil would be sufficient.



“We also want to know whether a potent dose of either basil or fenchol, if it could be delivered by nasal spray, would be a quicker way to get the compound into the brain," explained Yadav.



The study has published in the <a href="https://www.frontiersin.org/journals/aging-neuroscience">Frontiers in Aging Neuroscience</a>.&nbsp;



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By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Compound found in basil plants may prevent Alzheimer’s

Green vegetables are commonly associated as an essential part of...

After almost 50 years, specimens collected from a tree found in the Amazon <a href="https://www.earth.com/news/fires-are-transforming-the-amazon-rainforest-into-savanna/">rainforest</a> have been identified as a new species that has now received its own scientific name.



When Robin Foster originally came across the unusual tree in Peru's Manu National Park in 1973, he could not immediately identify the family to which it belonged. He collected samples of the tree’s leaves and its unusual fruits, which were bright orange and shaped like tiny paper lanterns. He took these home to the United States hoping that other botanists would help with identification.&nbsp;



“When I first saw this little tree, while out on a forest trail leading from the field station, it was the fruit – looking like an orange-colored Chinese lantern and juicy when ripe with several seeds – that caught my attention,” said Foster, retired curator at Chicago’s <a href="https://www.fieldmuseum.org/">Field Museum</a> and now a researcher with the Smithsonian Tropical Research Institute.&nbsp;



“I didn’t really think it was special, except for the fact that it had characteristics of plants in several different plant families, and didn’t fall neatly into any family.&nbsp; Usually, I can tell the family by a quick glance, but damned if I could place this one.”



Unfortunately, the other scientists were unable to help solve the mystery of the unknown Amazon species. Not only were they unable to identify the plant as a species that had been previously described by scientists, but they couldn’t even declare it a new species, because they could not determine what family it belonged to.&nbsp;



Nancy Hensold, a botanist at the Field Museum, remembers when Robin showed her a dried specimen of the plant more than 30 years ago.&nbsp;



“I came to work at the Field Museum in 1990, and Robin showed me this plant. And I tried to get it identified using little fine technical characters like boiling up the ovaries of the flowers and taking pictures of the pollen, and after all that, we still didn’t know,” said Hensold. “It really bugged me.”&nbsp;&nbsp;



The samples of the mystery Amazon species were then stored in the Field Museum’s herbarium, a library of dried plant specimens, for years, but Hensold and her colleagues didn’t forget about them. “When you have a plant no one can put in a family, it can fall through the scientific cracks. I felt for it,” said Hensold. The team eventually got a grant to study the plant, funded by the Field Museum’s Women’s Board, and the search was on.&nbsp;



DNA analysis of the dried specimens did not work well, so the researchers called on Patricia Álvarez-Loayza, a scientist who works in the Manu National Park, to collect fresh specimens of the plant. The DNA was analyzed in the Field Museum’s Pritzker DNA Laboratory and the results were shocking.



“When my colleague Rick Ree sequenced it and told me what family it belonged to, I told him the sample must have been contaminated. I was like, no way, I just couldn’t believe it,” recalled Hensold.&nbsp;



The DNA analysis revealed that the mystery plant’s closest relatives were in the Picramniaceae family, even though it didn’t look anything like its closest relatives. “Looking closer at the structure of the tiny little flowers I realized, oh, it really has some similarities but given its overall characters, nobody would have put it in that family,” explained Hensold.



The researchers were so surprised that they sent specimens to Wayt Thomas, a curator emeritus at The New York Botanical Garden and an expert in plants of the Picramniaceae family.&nbsp;



“When I opened the package and looked at the specimens, my first reaction was, ‘What the heck?’ These plants didn’t look like anything else in the family,” said Thomas, the lead author of the paper that describes the findings. “So, I decided to look more carefully – once I looked really carefully at the tiny, 2-3 millimeter-long flowers, things fell into place.”



The researchers were finally able to give the Amazon species a scientific name – Aenigmanu alvareziae. The genus name,&nbsp;Aenigmanu, means “mystery of Manu,” while the species name is in honor of Patricia Álvarez-Loayza, who collected the specimens used for the genetic analysis. It is important to note that, although Aenigmanu alvareziae&nbsp;has now been named to science for the first time, it has long been known and used by the indigenous Machiguenga people.



“Plants are understudied in general. Especially tropical forest plants. Especially Amazon plants.&nbsp;And especially plants in the upper Amazon," said Foster.&nbsp;



"To understand the changes taking place in the tropics, to protect what remains, and to restore areas that have been wiped out, plants are the foundation for everything that lives there and the most important to study."



"Giving them unique names is the best way to organize information about them and call attention to them. A single rare species may not by itself be important to an ecosystem, but collectively they tell us what is going on out there.”



The study is published in&nbsp;the journal <a href="https://onlinelibrary.wiley.com/journal/19968175">Taxon</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

Mystery Amazon species identified after nearly 50 years

After almost 50 years, specimens collected from a tree found...

Recent estimations suggest that up to two-thirds of the Arctic’s near-surface permafrost might disappear by the end of the century due to climate change. A new study published in the journal <a href="https://www.nature.com/articles/s41558-021-01162-y">Nature Climate Change</a> warns that rapidly melting <a href="https://www.earth.com/news/this-years-ozone-hole-is-larger-than-antarctica/">Arctic</a> permafrost could cause the spread of nuclear waste and previously unknown pathogens. 



The Arctic permafrost covers nine million square miles and dates up to one million years ago. Over the millennia, it has housed a large variety of microbes and chemical compounds that could be released into the atmosphere once the permafrost melts.



“Changes in the Arctic’s climate and ecology will influence every part of the planet as it feeds carbon back to the atmosphere and raises sea levels,” said study co-author Arwyn Edwards, a Reader in Biology at <a href="https://www.aber.ac.uk/en/">Aberystwyth University</a>. “This review identifies how other risks can arise from the warming Arctic. It has long been a deep-freezer for a range of harmful things, not just greenhouse gases."&nbsp;



"We need to understand more about the fate of these harmful microbes and pollutants and nuclear materials to properly understand the threats they may pose.”



Between 1955 and 1990, the Soviet Union conducted 130 nuclear weapon tests in the Novaya Zemlya archipelago, releasing 265 megatons of nuclear energy. Furthermore, over 100 decommissioned nuclear submarines were scuttled in the Kara and Barents Seas.&nbsp;



However, the Soviet Union is not the only culprit for making the permafrost a deposit of dangerous compounds. The United States' Camp Century nuclear-powered research facility in Greenland also produced a large amount of nuclear waste, which is now scattered within the Greenland ice sheet.



In addition to these man-made chemicals, the permafrost also houses a variety of ancient pathogens. Scientists have already discovered more than 100 species of microorganisms in the Siberian deep permafrost that appear to be antibiotic resistant. As permafrost thaws, there is a strong chance for these pathogens to mix with meltwater and mutate into other antibiotic-resistant strains that could easily cause future pandemics.&nbsp;



“It’s important to understand the secondary and tertiary impacts of these large-scale Earth changes such as permafrost thaw,” warned study lead author Dr. Kimberley Miner, an Earth and Climate Scientist at <a href="https://www.jpl.nasa.gov/">NASA’s Jet Propulsion Laboratory</a>.&nbsp;



"While some of the hazards associated with the thaw of up to a million years of material have been captured, we are a long way from being able to model and predict exactly when and where they will happen. This research is critical.”&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

Permafrost melting may release nuclear waste into the atmosphere

Recent estimations suggest that up to two-thirds of the Arctic’s...

As the human population increases into the mid-21st century, along with its demands for resources, we are faced with the task of working out how to supply food and other goods to people while simultaneously mitigating the effects on <a href="https://www.earth.com/news/coral-reef-biodiversity-expected-to-shuffle-but-not-decline/">biodiversity</a> and nature.



“Figuring out how to feed, clothe and power 11 billion people without causing mass species extinction and wrecking the climate is this century’s greatest challenge,” said Andrew Balmford, a professor of Conservation Science at the University of Cambridge and author of a new review on the topic.&nbsp;“Preserving diverse life while meeting humanity’s needs will mean enormous trade-offs, but the evidence is starting to point in one direction.”



Professor Balmford’s review summarizes a decade of global research on trade-offs between crop production and biodiversity.&nbsp;It also uses data from more than 2,500 individually assessed plant, insect and vertebrate species from five continents. The research highlights that there is an urgent need to limit humanity’s escalating impacts on nature while still providing for the needs of the ever-increasing human population.&nbsp;



To this end, Professor Balmford lays out the case for concentrating farming activities in limited, high-yield enterprises that use less land and use it more effectively. This then allows other lands to be spared for re-wilding and the exclusive use of nature.&nbsp;&nbsp;



Most species fare better under this “land sparing” approach than if farming tries to share land with nature – as wildlife-friendly agriculture still damages biodiversity and requires far more land to produce the same amount of food.



Cambridge-led studies on bird and tree species in India and West Africa found that, while all species are “losers” if mid-century food targets are met, more species “fare least badly” under extreme land sparing: concentrated farming that allows the freeing-up of more natural habitat.



“Colleagues have replicated these findings in field sites ranging from Mexico and the Pampas to Colombia and Kazakhstan,” said Professor Balmford. “Most species are specialized to particular environments. Even minor disruptions reduce their populations. This is why so many species decline even with gentler farming.”



“Most species fare much better if habitats are left intact, which means reducing the space needed for farming. So areas that are farmed need to be as productive as we can possibly make them."



He recognizes that some species do thrive on traditional farmlands, particularly in Europe, and so he has proposed that some lightly farmed areas need to remain in order to accommodate the conservation needs of these species. This implies a three-compartment model to farming in the future: high-yield farms maximize food production in the smallest possible land area; some low-yield farming areas are left where species specializing in these habitats can flourish; and the rest of the land is spared for the protection of natural habitats and their associated biodiversity.&nbsp;



The National Food Strategy (NFS), commissioned by the UK government and published this past summer, recommended that Balmford’s three-compartment model should form the basis of a new “Rural Land Use framework." This approach sees high-productivity farming being concentrated into the smallest possible area, thus sparing lands to return to natural habitat. The NFS points out that around 21 percent of farmed land in England will need to be rewilded to some extent or used for biofuel if the UK is to meet its net zero targets for emissions.



Concentrating farming activities in smaller areas while leaving and increasing natural habitats will create a patchwork landscape that will not only conserve species but also allow them to “seed” and repopulate entire regions and nations. These species will no longer be isolated in small fragments of natural habitat but will be able to spread throughout the patchwork of available rewilded lands.



Professor Balmford highlights the success of just four square kilometers of restored wetland near Lakenheath in the east of England. Covered with carrot fields as recently as 1995, the site is now a launchpad for egrets spreading northwards under climate change, and home to the first breeding cranes seen in The Fens for over 300 years.



Additionally, emerging evidence from areas including the Andes, the US and the UK suggests that “land sparing” is important in the fight against climate change, as carbon storage levels are higher if high-yield production allows for more natural vegetation. In this connection, previous research by Balmford suggests that if 30 percent of UK land was spared for woods and wetlands, it could store enough carbon to offset almost all emissions from UK farming by 2050 – and provide a colossal boost to British wildlife.



Important questions remain about how to deliver high yields sustainably, and also about how to ensure that high-yield farming goes hand-in-hand with the protection and restoration of habitats and is not simply used as an excuse for farmers to make more profit.



The framework can also be applied in other fields, including urban planning, recreation, forestry and fisheries. For example, New Zealand is taking the “sparing” approach in forestry management where over 70 percent of forests are protected while the trees are intensively harvested from pockets of pine plantation.&nbsp;



In addition, research suggests the “sparing” philosophy also offers hope for depleted oceans. Fish farming and concentrated areas of locally intensive fishing could provide enough food to allow dramatic expansion of “no-take” marine protected areas where species diversity and natural ecosystems could be left to flourish.&nbsp;



Crucially, future land management policies of this type must be linked to the ability to meet humanity’s need for food and other resources. “You can’t convince people to save nature if they are hungry. We need to ensure we can harvest enough from the biosphere while preserving the planet,” said Professor Balmford. “Conservation has to be pragmatic if we are to interrupt an ecological catastrophe.”



The study is published in the <a href="https://zslpublications.onlinelibrary.wiley.com/journal/14697998">Journal of Zoology</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

Farmland must be spared, not shared, for nature to thrive

As the human population increases into the mid-21st century, along...

A new study led by the <a href="https://icahn.mssm.edu/">Icahn School of Medicine at Mount Sinai</a> has found that exposure to <a href="https://www.earth.com/news/illegal-cannabis-farms-infringe-on-crucial-animal-habitats/">THC</a>, the main psychoactive ingredient of cannabis, can cause birth defects in genetically-predisposed mice.&nbsp;



Cannabis is one of the most frequently used recreational drugs, and is also one of the most common drugs used by pregnant women. However, its effects on embryonic development are not yet clearly understood.&nbsp;



Although it is still restricted in most countries, cannabis has been increasingly legalized for recreational and medical consumption in a variety of places, thus causing the number of its consumers to grow significantly.&nbsp;



According to a research team led by Robert Krauss, a professor of Cell, Developmental, and Regenerative Biology at the Icahn School of Medicine, exposure to THC could exacerbate a mutation that affects a mechanism that cells use to communicate to each other called <a href="http://annalsofneurosciences.org/journal/index.php/annal/article/view/531">Hedgehog signaling</a>.&nbsp;



“Several years ago, it was reported that THC could inhibit Hedgehog signalling in cells grown in a dish,” said Professor Krauss. “We reasoned that THC might be an environmental risk factor for birth defects, but that it would require additional risk factors, such as specific mutations in the genes required for Hedgehog signalling, to induce these defects in mice.”



In order to test this hypothesis, the scientists administered a single dose of THC to pregnant mice approximately a week after conception. Afterward, they studied the embryonic development of the pups, some of which carried a mutation affecting their Hedgehog signaling system.&nbsp;



The researchers discovered that the pups without the mutation developed normally, even when exposed to THC. However, the pups that carried the mutation and were exposed to the drug developed a face and brain defect called holoprosencephaly, which is characterized by the failure of the embryonic brain to divide into two lobes.



The findings could have important implications for human health too. “The THC concentration in cannabis is now very high, so it is important to perform epidemiology studies looking at whether cannabis consumption is associated with developmental defects."&nbsp;



"Women are already advised not to consume cannabis while pregnant, but our results show that embryos are sensitive at a very early period, before many women know they are pregnant. Cannabis consumption may therefore be inadvisable even when women are trying to get pregnant,” warned Professor Krauss.



The study is published in the journal <a href="https://dx.doi.org/10.1242/dev.199585">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

How does cannabis use affect embryonic development?

A new study led by the Icahn School of Medicine...

A new meta-analysis led by <a href="https://www.qmul.ac.uk/">Queen Mary University of London</a> has integrated the findings of 134 studies about the impact on consumer choice of color-coded nutrition labels and warnings from the front of <a href="https://www.earth.com/news/wild-seafood-has-one-sixth-the-carbon-footprint-of-red-meat/">food</a> packaging. 



The results of the analysis suggest that color-coded nutrition labels encourage people to make healthful purchases, while warning labels discourage customers to buy less healthy products. Thus, both labeling strategies appear to be highly beneficial for public health.&nbsp;&nbsp;



Some countries have introduced mandatory labels on the front of food products that show their nutritional values, or warn consumers about some unhealthy features that the products might have. Officials hope that such labeling strategies might help reduce the burden of disease associated to poor diets, and thus have an important impact on public health.



In order to clarify how four different types of front-of-package nutrition and warning labels influence consumer choice, Jing Song, a doctoral student at Queen Mary University, and his research team, conducted a network meta-analysis of data collected from 134 peer-reviewed studies published between January 1990 and May 2021. Their analysis showed that all four labeling systems seemed to have significant advantages in encouraging consumers to buy healthier products.



“This study found that color-coded labels and warning labels are all able to direct consumers towards more healthful purchase behavior,” explained the study authors. “Color-coded labels can promote the purchase of more healthful products, while warning labels discourage the purchase of less healthful products.”



A better understanding of the nutritional qualities of each product appeared to influence consumers to select foods and drinks with lower levels of energy, sodium, fats, and saturated fats. The findings can help refine policies of food labeling in order to improve public health, and perhaps also provide guidance to the food industry to reformulate some of their less healthy products.&nbsp;&nbsp;



The study was published in the journal <a href="https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003765">PLOS Medicine</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

Nutrition labels help people buy healthier products

A new meta-analysis led by Queen Mary University of London...

Society is becoming increasingly aware of the detrimental effects that rising CO2 levels will have on the climate, but until recently, little has been known about the effect that this will have on <a href="https://www.earth.com/news/scientists-investigate-the-origin-of-photosynthesis/">photosynthesis</a>. A new study led by the <a href="https://www.birmingham.ac.uk/">University of Birmingham</a> exposed old oak trees to elevated levels of CO2.. Over the course of three years, the 175-year-old oaks responded to rising CO2 levels by increasing their rate of photosynthesis.



The team worked in collaboration with colleagues from Western Sydney University’s EucFACE eucalyptus forest. The university is conducting the experiment with an old oak forest, using CO2 levels that represent the average levels expected by 2050.&nbsp;



The researchers measured carbon levels within the wood, roots, leaves, and soil of the oak trees in order to pinpoint changes in photosynthesis and locate where and how excess CO2 is stored.



“I’m really excited to contribute the first published science results to BIFoR FACE, an experiment of global importance," expressed lead researcher Anna Gardner. “It was hard work conducting measurements at the top of a 25 m oak day after day, but it was the only way to be sure how much extra the trees were photosynthesizing."



The results of the study concluded that photosynthesis rates of the oak trees increased by up to a third, with the highest rate of change being found in trees exposed to strong sunlight.



It was also discovered that ratios of the key nutrients carbon and nitrogen did not change in the leaves, demonstrating that the old oak trees can adapt to redirect nitrogen into the soil to balance out the increased intake of carbon.



“Previous work at EucFACE measured photosynthesis increased by up to a fifth in increased carbon dioxide," explained Professor David Ellsworth. "So, we now know how old forest responds in the warm-temperate climate that we have here in Sydney and the mild temperate climate of the northern middle latitudes where Birmingham sits. At EucFACE we found no additional growth in higher CO2, and it remains to be seen if that will be the case for BIFOR as well.”



“We are sure now that the old trees are responding to future carbon dioxide levels," said Professor Rob MacKenzie, Founding Director of BIFoR. "How the entire forest ecosystem responds is a much bigger question requiring many more detailed investigations. We are now pushing ahead with those investigations.”



The results of the study have been published in the journal <a href="https://academic.oup.com/treephys">Tree Physiology</a>.



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By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Old oak trees ramp up photosynthesis in response to rising CO2

Society is becoming increasingly aware of the detrimental effects that...

There is evidence that psychedelic mushrooms, popularly known as “magic mushrooms,” have been consumed by humans for over six millennia. In 1958, Swiss chemist Albert Hoffman was the first to isolate and synthesize <a href="https://www.earth.com/news/psilocybin-treatment-rapidly-relieves-symptoms-of-major-depression/">psilocybin</a>, the main psychoactive ingredient of magic mushrooms. The potential for psilocybin to treat severe depression has been scientifically acknowledged, and clinical trials are currently underway.&nbsp;



A new study has found that psilocybin also enhances emotional responses to music among healthy individuals. Researchers from the <a href="https://www.ku.dk/english/">University of Copenhagen</a> and <a href="https://www.imperial.ac.uk/">Imperial College London</a> tested a cohort of participants on their emotional response to music after being given psilocybin. In addition, a control group was given ketanserin, an antihypertensive drug with no marked psychological effects.&nbsp;



At the peak of the psilocybin effects, participants listened to a short music program, comprising Elgar’s Engima Variations no. 8 and 9 and Mozart’s Laudate Dominum, and were asked to rate their emotional response according to the <a href="https://www.uibk.ac.at/psychologie/fachbereiche/pdd/personality_assessment/gems/about-the-gems/index.html.en">Geneva Emotional Music Scale</a>.



Study lead author Dea Siggaard Stenbæk is an associate professor who specializes in Affective Cognitive Neuroscience and Crisis Psychology at the University of Copenhagen.



“We found that psilocybin markedly enhanced the emotional response to music, when compared to the response before taking the drugs. On the measurement scale we used, psilocybin increased the emotional response to music by around 60 percent,” said Professor Stenbæk. 



“This shows that the combination of psilocybin and music has a strong emotional effect, and we believe that this will be important for the therapeutic application of psychedelics if they are approved for clinical use. Psilocybin is under development as a drug to treat depression, and this work implies that music needs to be considered as a therapeutic part of the treatment.”



The findings suggest that the enhanced emotional processing may be a positive outcome of combining psylocibin with music, which means that scientists should use music as an active component of psylocibin therapy. 



David J. Nutt, a professor of Neuropharmacology at Imperial College London, said that psilocybin-based depression treatments could be optimized by personalizing the music tracks used in therapy.



According to the study authors, understanding the contribution of enhanced music-evoked emotions to other psychedelic phenomena - such as mystical type experiences - will also be important for establishing music as a key element in psychedelic therapy.



This research was presented at the <a href="https://www.ecnp.eu/Congress2021/ECNPcongress">European College of Neuropharmacology (ECNP) Congress</a> in Lisbon, Portugal.



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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

Magic mushrooms enhance music appreciation

There is evidence that psychedelic mushrooms, popularly known as “magic...

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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

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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?

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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 



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.

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



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 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

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Earth,Like,Exoplanet,3d,Render

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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

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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

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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



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.

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



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 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

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