Who invented the wheel? This question has been a topic of debate for centuries. But because it predates recorded history, the exact inventor of the wheel has remained unknown.



Despite the wheel's undeniable importance in human history, its origins have been shrouded in mystery and speculation. What we do know is that the wheel likely evolved over time from simpler tools.



<h2 class="wp-block-heading" id="h-redefining-the-origins-of-the-wheel">Redefining the origins of the wheel</h2>



A new study on the evolution of the wheel has pushed the clock back by 6,000 years, offering new and compelling insights into this fascinating puzzle.



This discovery represents an exciting development that shatters the conventional timeline, moving it far beyond the previously accepted era of 4000 BC in ancient <a href="https://www.earth.com/news/mesopotamian-bricks-reveal-anomaly-in-earths-magnetic-field-3000-years-ago/" target="_blank" rel="noreferrer noopener">Mesopotamia</a>.



It was during that period when the wheel was first recognized as an essential tool, initially used in pottery-making and preceding the <a href="https://www.earth.com/news/bronze-age-teeth-discovery-highlight-the-evolution-of-the-human-diet/" target="_blank" rel="noreferrer noopener">Bronze Age</a> innovation of wheeled vehicles by centuries.



This newfound understanding prompts a reevaluation of how early humans harnessed rotational technology and its transformative impact on the trajectory of human civilization.



<h2 class="wp-block-heading" id="h-development-of-rotational-tools">Development of rotational tools</h2>



The spotlight is now shining on an archaeological discovery in Israel that has potentially rewritten this humble invention’s history and shifted our understanding of early human ingenuity.



Over a hundred perforated pebbles - primarily composed of limestone and bearing a circular shape with a central hole - were unearthed at the Nahal-Ein Gev II site, a location that has already provided valuable insights into <a href="https://www.earth.com/news/prehistoric-women-were-not-just-gatherers-they-were-hunters-too/" target="_blank" rel="noreferrer noopener">prehistoric</a> life.



This extraordinary find represents a key milestone in the development of rotational tools, including our beloved wheel, and emphasizes the sophisticated craftsmanship and resourcefulness of <a href="https://www.earth.com/news/kids-in-hunter-gatherer-stone-age-societies-had-better-parenting-than-modern-children/" target="_blank" rel="noreferrer noopener">early societies</a>.



It reveals not only the ingenuity behind these tools but also hints at the broader implications for the evolution of technology and innovation in human history.



<h2 class="wp-block-heading" id="h-invention-of-a-wheel-shaped-tool">Invention of a wheel-shaped tool</h2>



What's astonishing is that these ancient stones date back to approximately 12,000 years, far surpassing any previously known examples. 



Scholars from the <a href="https://en.huji.ac.il/" target="_blank" rel="noreferrer noopener">Hebrew University of Jerusalem</a> suggest that these stones served as spindle whorls - round weighted objects attached to a spindle stick.



This tool was instrumental in gathering fibers such as wool and spinning them into yarn, demonstrating the human use of rotation with a wheel-shaped tool.



<h2 class="wp-block-heading" id="h-the-first-wheels-in-form-and-function">The first wheels in form and function </h2>



Professor Leore Grosman emphasized the importance of these artifacts, describing them as early examples of wheel-shaped tools connected to a rotating axle.



"These perforated stones are actually the first wheels in form and function - a round object with a hole in the center connected to a rotating axle, used long before the appearance of the wheel for transportation purposes," said Professor Grosman.



This early use eventually paved the way for more advanced wheel-based rotational inventions, including the renowned potter's wheel and, later, the significantly useful cart wheel.



<h2 class="wp-block-heading" id="h-fingerprints-of-prehistoric-innovation">Fingerprints of prehistoric innovation</h2>



"The most important aspect of the study is how modern technology allows us to delve deep into touching the fingerprints of the prehistoric craftsman, then learn something new about them and their innovativeness, and at the same time, about our modern technology and how we're linked," noted the researchers.



Their study embodies the "wheel and axle" concept, a revolutionary mechanism that triggered technology's transformation from linear to rotary motion.



The paper concludes that the ancient origins tied to the carts' prominence during the Bronze Age now focus on a much-earlier wheel-shaped tool.



So, the next time you marvel at the complexity of modern machinery, remember its connection to these humble stones from 12,000 years ago, and appreciate the role of human innovation throughout the ages.



<h2 class="wp-block-heading" id="h-human-ingenuity-and-innovation">Human ingenuity and innovation</h2>



This discovery not only enriches our understanding of early <a href="https://www.earth.com/news/400000-year-old-stone-tools-show-technological-adaptations-of-prehistoric-humans/" target="_blank" rel="noreferrer noopener">technological advancements</a> but also illustrates the seamless progression from simple tools to complex mechanisms.



The spindle whorls unearthed at Nahal-Ein Gev II showcase the fundamental principles of rotational technology, a concept that would eventually lead to the wheel's application in pottery, transportation, and machinery.



By examining these early developments, researchers draw parallels between ancient creativity and modern technology, highlighting the continuous thread of human ingenuity through the ages.



The study is published in the journal <a href="https://search.app?link=https%3A%2F%2Fjournals.plos.org%2Fplosone%2Farticle%3Fid%3D10.1371%2Fjournal.pone.0312007&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">Plos One</a>.



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Who invented the wheel? It all started with stones

Who invented the wheel? This question has been a topic of debate for centuries. But because it predates recorded history, the exact inventor of the wheel has remained unknown. Despite the wheel's undeniable importance in human history, its origins have been shrouded in mystery and speculation. What we do know is that the wheel likely evolved over time from simpler tools. Redefining the origins of the wheel A new study on the evolution of the wheel has pushed the clock back by 6,000 years, offering new and...

Although women tend to live longer than men, they typically have higher rates of illness. A new study led by the <a href="https://www.uga.edu/">University of Georgia</a> (UGA) has found that these problems can be improved by a better <a href="https://www.earth.com/news/healthier-diets-can-reduce-depression-in-young-men/">diet</a> containing pigmented carotenoids such as kale, spinach, yams, watermelon, bell peppers, carrots, tomatoes, and oranges. These brightly-colored fruits and vegetables are crucial for preventing visual and cognitive degeneration.



“The idea is that men get a lot of the diseases that tend to kill you, but women get those diseases less often or later so they persevere but with illnesses that are debilitating,” explained study co-author Billy R. Hammond, a professor of Behavioral and Brain Sciences at UGA. “For example, of all of the existing cases of macular degeneration and dementia in the world, two-thirds are women. These diseases that women suffer for years are the very ones most amenable to prevention through lifestyle.”



Professor Hammond and his colleagues studied several degenerative conditions that women seem to experience at much higher rates than men, ranging from autoimmune diseases to dementia. “If you take all the autoimmune diseases collectively, women account for nearly 80 percent. So, because of this vulnerability, linked directly to biology, women need extra preventive care,” he added.



One of the reasons for women’s vulnerability to such diseases is related to the way they store vitamins and minerals in their bodies. Since women have, on average, more body fat than men, they can better store in their bodies dietary vitamins and minerals. However, there are less of these vitamins available for their retina and brain, thus putting them at more risk for degenerative problems.



Since pigmented carotenoids such as lutein or zeaxanthin act as powerful antioxidants in humans, they can help improve central nervous system degeneration. “Men and women eat about the same amount of these carotenoids, but the requirements for women are much higher,” said Professor Hammond.



“The recommendations should be different, but there are, generally, not any recommendations for men or women for dietary components that are not directly linked to deficiency disease (like vitamin C and scurvy). Part of the idea for the article is that recommendations need to be changed so that women are aware that they have these vulnerabilities that they have to proactively address, so they don’t have these problems later in life.”



Although these carotenoids are also available via dietary supplements, getting them through food is a much better strategy.&nbsp;



“Components of diet influence the brain, from things like personality to even our concept of self.&nbsp;I don’t think people quite realize what a profound effect diet has on basically who they are, their mood, even their propensity to anger. And now of course this is extended to the microbiome and the bacteria that make up your gut - all of these components work together to create the building blocks that compose our brain and the neurotransmitters that mediate its use,” Professor Hammond concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1080/1028415X.2022.2084125">Nutritional Neuroscience</a>.&nbsp;&nbsp;&nbsp; &nbsp;



---



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;

Women can live longer and better with a healthy diet

Although women tend to live longer than men, they typically...

Outer,Space,Planet,Earth,Mars,Meteorite,Comet,Asteroid,Astrology,Solar

It is impossible to know the geological history of the formation of our <a href="https://www.earth.com/news/the-habitability-of-a-planet-is-affected-by-the-location-of-its-land/">planet</a>, because it has been destroyed by the subsequent tectonic movement and evolution of the Earth’s surface. Or perhaps it is not entirely impossible… 



There are very rare clues about this process that may be obtained from pieces of other planets that have arrived on Earth’s surface in the form of meteorites. In particular, Mars may provide an indication of the early evolutionary path of our planet. More than 4.5 billion years ago, Mars may have had a crust similar to that found on early Earth, and the information about this crust may be hiding in the very oldest Martian meteorite currently known to have landed on Earth.&nbsp;



But first, scientists had to identify where exactly the 4.48-billion-year-old meteorite, nicknamed Black Beauty, came from on the surface of Mars. The study, published in <a href="https://www.nature.com/articles/s41467-022-31444-8">Nature Communications</a>, details the methods that the international team used to identify that this piece of Martian rock originated from one of the oldest regions of the surface of Mars.



“This meteorite recorded the first stage of the evolution of Mars and, by extension, of all terrestrial planets, including the Earth,” said Valerie Payré, a postdoctoral researcher in the Department of Astronomy and Planetary Science at <a href="https://nau.edu/">Northern Arizona University</a>. “As the Earth lost its old surface mainly due to plate tectonics, observing such settings in extremely ancient terrains on Mars is a rare window into the ancient Earth surface that we lost a long time ago.”



The meteorite, known officially as NWA (Northwest Africa) 7034 for where it was recovered, is composed of a variety of igneous, sedimentary, and impact melt clasts, including the most evolved and oldest igneous clasts and zircons, dated at 4.44–4.48 Ga (billion years), approximately the time of the formation of Mars. Although the scientists know details of its chemical composition, the source region of this unique meteorite on Mars has so far remained unknown. Given its antiquity, it is possible that it is a piece of the planet’s early crust and thus preserves insights into the geological history of the planet.&nbsp;



Previous research, using a crater-detection algorithm and high resolution images of the surface of Mars, had identified only 18 crater sites where asteroid strikes were powerful enough to have hurled NWA 7034 far enough off the Martian surface to enter space and begin its journey to Earth’s surface.&nbsp;



The current research, led by Anthony Lagain from Curtin University in Australia, used the geochemical and geophysical properties of the ancient meteorite, along with its geochronology, to identify which of these craters was the potential origin of this piece of Mars. They found only one candidate - the Karratha crater - which matched the meteorite’s unique combination of magnetic field intensity, high concentrations of potassium and thorium, and dating details. Furthermore, the experts deduced that when the asteroid that formed this crater struck the surface of Mars, it ejected other debris, including NWA 7034, that was lying on the surface as the result of a much earlier collision that had formed the older crater named Khujirt.&nbsp;



Both these craters are found in the region known as Terra Cimmeria-Sirenum, a highland region covering about 10 percent of the planet, where there are high concentrations of the elements potassium and thorium, and a high magnetic field intensity. It is one of the most ancient regions of Mars, considered to represent a block of ancient crust, and this makes it possible that the Black Beauty is actually a piece of the very early geological history of the planet.&nbsp;



“For the first time, we know the geological context of the only brecciated Martian sample available on Earth, 10 years before the NASA’s Mars Sample Return mission is set to send back samples collected by the Perseverance rover currently exploring the Jezero crater,” said Lagain, a research fellow in the School of Earth and Planetary Sciences at Curtin. “This research paved the way to locate the ejection site of other Martian meteorites, in order to create the most exhaustive view of the Red Planet’s geological history.”



Payré studies the nature and formation of Mars’ crust to determine if Earth and Mars share a common past that includes both a continent-like and ocean-like crust. She uses orbital observations captured in this region to investigate whether traces of volcanism similar those found on Iceland exist on Mars.



“As of today, Mars’ crust complexity is not understood, and knowing about the origin of these amazing ancient fragments could lead future rover and spatial missions to explore the Terra Sirenum-Cimmeria region that hides the truth of Mars’ evolution, and perhaps the Earth’s,” said Payré.&nbsp;



"This work paves the road to locate the ejection site of other Martian meteorites that will provide the most exhaustive view of the geological history of Mars and will answer one of the most intriguing questions: why Mars, now dry and cold, evolved so differently from Earth, a flourishing planet for life.”



---



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

Martian meteorite holds clues about Earth's origins

It is impossible to know the geological history of the...

By analyzing stress hormones in elephants that lost their mothers, a team of researchers led by <a href="https://www.colostate.edu/">Colorado State University</a> has found that young, orphaned elephants appear to physically benefit from the support of other young elephants. The study revealed that elephants with more similarly aged “friends” in their group had lower stress levels than their more solitary conspecifics. Thus, “social support” appears to be crucial in reducing the stress caused by the loss of a mother in these highly intelligent and social animals.



&nbsp;“If you’re out in the field, watching elephants, you can just tell that family life is everything,” said study lead author Jenna Parker, an ecologist at Colorado State University. “Calves are rarely more than maybe ten meters from their mother until they’re about eight or nine years old. And if some of the elephants go off, you’ll hear them calling to one another. They want to know where each other are all the time.”



Between 2009 and 2013, there was a marked increase in poaching for ivory in the two reserves in Kenya where this study took place, leaving a large number of young elephants orphaned. “I wanted to follow that up and look at what happens physiologically for these orphans,” Dr. Parker said.



Together with her colleagues, Dr. Parker followed groups of African elephants for over a year and analyzed their fecal samples to measure stress hormone levels. By carefully monitoring 25 young orphaned elephants that had lost their mothers between one and 19 years earlier, the researchers found that those with more similarly aged companions had significantly lower stress hormones than others.



These findings are similar to previous research done on humans which discovered that orphaned children who had a strong level of social support from family and peers were less likely to develop post-traumatic stress disorder after losing their parents. “And what we seem to find in elephants is that those with their family and social support maintain more normal stress hormone levels in the long term,” Dr. Parker said. “I just think it’s really cool that such a social animal has evolved so separately from humans, and that we still seem to converge on how important social ties are.”



According to the scientists, this study could inform future conservation efforts of these endangered animals. By better understanding their social structure – characterized by strong elephant-to-elephant support in the face of loss – conservationists could devise better initiatives to help these animals adapt to the myriad threats that they face.



The study is published in the journal <a href="https://www.nature.com/articles/s42003-022-03574-8">Nature Communications Biology</a>.



---



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;

Social support can lower stress levels in orphaned elephants

By analyzing stress hormones in elephants that lost their mothers,...

Researchers in the College of Health and Life Sciences at <a href="https://www.aston.ac.uk/">Aston University</a> have discovered a link between fruit consumption, savory food consumption, and mental health.&nbsp;The results suggest that people who regularly eat fruit have a lower risk of <a href="https://www.earth.com/news/healthier-diets-can-reduce-depression-in-young-men/">depression</a>.



The study, published in the <a href="https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/frequency-of-fruit-consumption-and-savoury-snacking-predict-psychological-health-selective-mediation-via-cognitive-failures/B6A4BDD48E1A39C133DF454860A53239">British Journal of Nutrition</a>, was focused on 428 adults from the United Kingdom. The participants reported their consumption of fruit, vegetables, sweet and savory food snacks, as well as their mental health.&nbsp;



Once they accounted for general health, age, and exercise, the researchers discovered that frequent fruit consumption could lead to less depression and better mental health and well-being.&nbsp;



The experts also discovered that those who frequently consumed savory, nutrient-poor foods, such as potato chips, were more likely to experience mental lapses such as forgetting names or where their keys are. These episodes led to more incidences of stress, depression, and anxiety.



The researchers determined that it's not the amount of fruit consumed that leads to better mental health, but the frequency. The experts also found no link between memory lapses and fruits, vegetables, or sweet snacks. They believe this indicates there is something unique about nutrient-poor savory snacks that cause mental lapses.&nbsp;



"Other studies have found an association between fruit and vegetables and mental health, but few have looked at fruit and vegetables separately – and even fewer evaluate both frequency and quantity of intake," said study lead author and PhD student Nicola-Jayne Tuck.



"Both fruit and vegetables are rich in antioxidants, fiber, and essential micronutrients which promote optimal brain function, but these nutrients can be lost during cooking. As we are more likely to eat fruit raw, this could potentially explain its stronger influence on our psychological health."



According to Tuck, it is possible that changing what we snack on could be a really simple and easy way to improve our mental well-being.&nbsp;



"Conversely, it is also possible that the forthcoming restriction of processed snack foods at checkouts, due to come in this October, could not only improve the country's physical health, but mental health too.”



"Overall, it's definitely worth trying to get into the habit of reaching for the fruit bowl."



---



By <a href="mailto:nire518@gmail.com">Erin Moody </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Eating fruit is a simple way to improve your mental health

Researchers in the College of Health and Life Sciences at...

The world's coastal glaciers are disappearing faster than ever, but the causes of the large-scale retreat are challenging to pinpoint due to natural fluctuations. Since researchers have been unable to conclude what is causing rapid glacier retreat, the last Intergovernmental Panel on Climate Change report determined that they could not say whether the melting is due to natural conditions or human-caused <a href="https://www.earth.com/news/climate-change-may-boost-wine-production-in-the-uk/">climate change</a>. 



Researchers at the <a href="https://www.ig.utexas.edu/">University of Texas Institute for Geophysics</a> (UTIG) and Georgia Tech sought to unravel the mystery of coastal glacier disappearance and uncover how much of the retreat is due to human-induced climate change.&nbsp;



The researchers developed a method that can treat glacial melting as an individual event, like a wildfire. The newly published study can account for differences between glaciers and natural climate fluxes while testing the effect of global warming. "And that's the first time anyone's done that," explained study co-author and UTIG glaciologist Ginny Catania.



To test their model, the research team conducted thousands of simulations of the past 150 years with and without global warming. Not surprisingly, the results showed that global warming caused an increased likelihood of glacial melting.&nbsp;



When they ran the simulations without human-caused climate change, they found that the current glacial retreat would be impossible without the effects of a changing climate.&nbsp;



For example, the coastal glaciers of Greenland have been retreating at different rates since 2000, with almost all of them (200) in varying stages of retreat. The researchers believe this level of retreat would not have been attainable without man-made climate change.&nbsp;



"This study gives us a toolbox to determine the role of humans in the loss of ice from Greenland and Antarctica, to say with confidence that it's not just coincidence," said Georgia Tech glaciologist and study co-author Alex Robel.



The researchers hope that their conclusions will influence future policy. According to John Christian, a postdoctoral researcher at UT Austin and Georgia Tech, the methodology proposes in the study is a road map toward making confident statements about what the human role is in glacier retreat. "Those statements can then be communicated to the public and policymakers, and help in their decision making."



This study is published in n the journal <a href="https://tc.copernicus.org/articles/16/2725/2022/">The Cryosphere.</a>&nbsp;



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By <a href="mailto:nire518@gmail.com">Erin Moody </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Coastal glacier retreat linked to human-caused climate change

The world's coastal glaciers are disappearing faster than ever, but...

Heavy <a href="https://www.earth.com/news/forever-chemicals-found-in-drinking-water-near-u-s-military-bases/">drinking</a> and dependence on alcohol are known to cause cognitive impairment, including memory loss and problems with verbal fluency, verbal learning, processing speed, attention and problem solving. However, the effects of moderate drinking on brain function have not been investigated. Considering that most people who consume alcohol probably fall into this category, such a study is well overdue.&nbsp;



A team led by Anya Topiwala of the University of Oxford recently explored the relationship between alcohol consumption and cognitive function in more than 20,000 participants from the UK Biobank. Not only did participants report their own alcohol consumption, they also undertook various cognitive tests that assessed executive function, fluid intelligence and reaction time.



The researchers went a step further and measured the levels of iron present in the participants’ brains and livers, in an attempt to establish whether iron levels represent a potential pathway to alcohol-related cognitive deficits. Iron is involved in many fundamental biological processes in the brain including oxygen transportation, DNA synthesis, mitochondrial respiration, myelin synthesis, and neurotransmitter synthesis and metabolism. But high levels of this element have also been found in the brains of people with neurodegenerative conditions such as Alzheimer’s and Parkinson’s diseases.



In the largest study to date of moderate alcohol consumption and iron accumulation, the researchers recruited 20,965 participants who had completed their UK Biobank questionnaires and had undergone MRI imaging of the brain. Approximately 7,000 of these also underwent scanning of the liver, with both types of scans being used to identify levels of iron in the cells.&nbsp; The mean age of participants was 55 years, and 48.6 percent were female. Although 2.7 percent classed themselves as non-drinkers, average intake was around 18 units per week, which translates to about 7½ cans of beer or 6 large glasses of wine.&nbsp;



This level of alcohol consumption, classed as moderate, was higher than current UK low-risk guidelines (&lt;14 units per week), but within low-risk guidelines at the time for men (not more than 21 units per week, pre-2016). Despite this, the researchers found links between level of alcohol consumption, presence of elevated iron concentrations in certain brain areas, and deterioration in cognitive function.



The team found that alcohol consumption of above seven units per week was associated with markers of higher iron in several brain nuclei, including the bilateral putamen, caudate and substantia nigra. These basal ganglia, and the substantia nigra in the mesencephalon, are associated with the control of motor movements, procedural learning, eye movement, cognition, emotion and other functions.&nbsp;



The significantly higher levels of iron accumulated in these brain areas had also been identified in previous research on people with Alcohol Use Disorder, also known as alcohol addiction, but in the present study the result was seen in people who were only moderate users of alcohol.



In addition, higher alcohol consumption was associated with increased levels of iron in the liver, which is considered a good indicator of the levels of iron in the body in general, and the researchers found that iron levels were also the best indicators of alcohol-related liver damage. Alcohol suppresses the production of hepcidin, an important hormone in the liver that regulates iron balance. As a result, alcohol consumption leads to increased absorption of iron from digested food and can be expected to result in imbalances in iron levels in body organs such as the brain.



High iron levels in some brain regions were also associated with worse outcomes on cognitive tests, such as trail-making tests that assess executive function, and fluid intelligence tests that assess reason and logic. Reaction times were also slower in cases where certain brain regions were shown to have higher levels of iron.



There are some limitations to this large study of moderate alcohol consumption and iron accumulation. Drinking was self-reported and could have been underestimated, by participants. In addition, MRI-derived measures are indirect representations of brain iron, and could conflate other brain changes observed with alcohol consumption and that have changes in iron levels.



In conclusion, Topiwala states, “In the largest study to date, we found drinking greater than 7 units of alcohol weekly associated with iron accumulation in the brain. Higher brain iron in turn linked to poorer cognitive performance. Iron accumulation in the brain could thus underlie alcohol-related cognitive decline.”



Given the prevalence of moderate drinking in today’s world, even small links between alcohol and reduced brain function could have substantial impacts across whole populations. Thus, these results support the introduction of interventions to reduce alcohol consumption in the general population.



The research is published in the journal <a href="https://journals.plos.org/plosmedicine/">PLoS Medicine</a>.



---



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

A single glass of wine a night could lead to cognitive decline

Heavy drinking and dependence on alcohol are known to cause...

<a href="https://www.earth.com/news/antarctic-glaciers-are-melting-at-highest-rate-in-5500-years/">Glaciers</a> in tropical mountain ranges are experiencing climate change similar to those in the polar regions of Antarctica and the Northern Hemisphere. An international team of scientists is the first to show that the effects of greenhouse gases are impacting tropical glaciers in the Southern Hemisphere at the same pace as ice sheets in the north.&nbsp;&nbsp;



Much of what scientists have known about glacial changes came from records of ice growth and decay that occurred in the Northern Hemisphere. For the current study, the researchers analyzed sediments from Lake Junín - located high in the Peruvian Andes - to create a record of glacial changes stretching back 700,000 years.



“As we try to understand how climate works across the globe, we need more than just records that are influenced by and biased toward the Northern Hemisphere,” said Professor Robert Hatfield of the <a href="https://www.ufl.edu/">University of Florida</a>.



The land-based lake record collected by the team matches the duration of ice core records from Antarctica. It also represents the longest time frame ever collected from the Southern Hemisphere.



“What makes our findings unique is that we were able to get a continuous and independently dated record of tropical Alpine glaciation for the first time,” said Professor Hatfield. “The key takeaway was that the tropics follow the same beat and same rhythm to what’s going on in the Northern Hemisphere.”



Glacier changes in both regions occurred simultaneously, despite variations in solar radiation. This suggests that the rise in atmospheric greenhouse gasses associated with changes in the volume of the ice sheets of the north is impacting the entire planet.



To collect the data, geologists launched a massive drilling mission at the lake in 2015, funded by the <a href="https://www.nsf.gov/">National Science Foundation</a> and International Continental Scientific Drilling Program. 100 meters of sediment from the lake’s basin was collected. With the sediment recovered, researchers spent the next few years developing a solid age model.



Study co-author Christine Y. Chen of the Lawrence Livermore National Laboratory analyzed the uranium and thorium content of the sediments to determine how much time was represented by the sediment core.



“Scientists have known for nearly a century that rising greenhouse gases will affect the climate in every corner of the world, but we’ve been less certain about how rapidly changes in ice volume at the poles will propagate to the rest of the world.” Chen said.&nbsp;



“The high-altitude mountains in the tropics are essentially as far away from the poles one can get. We’ve now shown that ice in both regions have been growing and decaying synchronously with one another for nearly a million years, which further highlights the interconnectedness of our planet.”



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Tropical glaciers are losing ice at the same rate as the poles

Glaciers in tropical mountain ranges are experiencing climate change similar...

Anna's,Hummingbird,Adult,Male,Hovering,And,Feeding.,Santa,Cruz,,California,

Many <a href="https://www.earth.com/news/water-fleas-adapt-to-life-with-deadly-carnivorous-plants/">plant</a> and animal species are seeking refuge in higher elevations to escape the stress of rising temperatures.&nbsp; In a study funded by the <a href="https://www.nsf.gov/">National Science Foundation</a>, experts have discovered that hummingbirds will not be able to adjust to life at higher altitudes, and this is primarily due to lower oxygen availability.



"Many species have not tracked their thermal niches upslope as predicted by climate change, potentially because higher elevations are associated with abiotic challenges beyond temperature. To better predict whether organisms can continue to move upslope with rising temperatures, we need to understand their physiological performance when subjected to novel high-elevation conditions," wrote the study authors.&nbsp;



"Here, we captured Anna's hummingbirds - a species expanding their elevational distribution in concordance with rising temperatures - from across their current elevational distribution and tested their physiological response to novel abiotic conditions."



After the birds had time to adjust to a high-altitude habitat, the researchers measured their metabolic rates. The results showed found that these rates had dropped by nearly 40 percent compared to the rates measured in the birds' natural habitat.



"Overall, these results suggest low air pressure and oxygen availability may reduce hovering performance in hummingbirds when exposed to the challenge of high-elevation conditions," said study lead author Austin Spence of the <a href="https://uconn.edu/">University of Connecticut</a>.



According to the experts, the birds also spent more time in a torpid state at higher altitudes regardless of the elevation of their original habitat. "Whether they're from a warm or cool spot, they use torpor when its super-cold," said Spence.



Hummingbirds from higher elevations do not have enlarged lungs to compensate for a lack of oxygen, but their hearts are larger and can circulate more oxygen.



"Our results suggest lower oxygen availability and low air pressure may be difficult challenges to overcome for hummingbirds," said Spence.&nbsp;



"Future studies should investigate how chronic exposure and acclimatization to novel conditions, as opposed to acute experiments, may result in alternative outcomes that help organisms better respond to abiotic challenges associated with climate-induced range shifts," concluded the researchers.



The study is published in the <a href="https://journals.biologists.com/jeb">Journal of Experimental 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> Editor

Hummingbirds will not be able to retreat to high altitudes

Many plant and animal species are seeking refuge in higher...

In a new study published in the journal <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0270207">PLoS ONE</a>, researchers have investigated how COVID-19 restrictions changed behavior patterns, and how these patterns continue to change. The study focused on the U.K., where activities and social events were restricted near the start of the COVID-19 pandemic to slow the spread of the virus.&nbsp;



A lot of research has already looked at how COVID-19 restrictions changed human behavior. The new study is unique in looking at how behavior in the U.K. changed over time as restrictions continued to evolve.&nbsp;&nbsp;



To understand their research topic better, the scientists conducted six different online surveys to track changes in behavior patterns among 203 respondents. The surveys asked participants about different activities they engaged in during various phases of the pandemic, and whether they did these activities in person or online.&nbsp;



An analysis of the results showed that the biggest changes were the investment of time in social and cultural activities and travel. The surveys also confirmed that most individuals shifted from more in-person activities to more online events. Furthermore, although all pandemic restrictions were removed on July 19, 2021, many of these behavioral shifts still remain in place.&nbsp;



“This longitudinal study determines the frequency and way of people doing activities from Spring 2020 to Summer 2021 during different phases of the COVID-19 pandemic in the UK," said study co-author Lan Li of <a href="https://www.ucl.ac.uk/">University College London</a>.



"The findings provide an invaluable insight into understanding how people in the UK changed their lifestyle, including what activities they do, and how they accessed those activities in light of the COVID-19 pandemic and related public health policy implemented to address the pandemic.”



The scientists hope that their work will help inform policy makers on the impact of their restrictions for future decision making.&nbsp;



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By <a href="mailto:nire518@gmail.com">Erin Moody </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Pandemic restrictions had a lasting effect on behavior patterns

In a new study published in the journal PLoS ONE,...

Bladderworts are carnivorous plants that are found in freshwater lakes and marshes, and in waterlogged soil on all continents except <a href="https://www.earth.com/news/giant-groundwater-system-discovered-beneath-antarctica/">Antarctica</a>. Their sophisticated “bladders” are highly adapted to suck in any prey that swim past and disturb the trigger “hairs” connected to the trapdoor that opens into the bladder. Species with larger bladders can feed on aquatic prey such as water fleas, nematodes, mosquitolarvae and even fish fry and young tadpoles. 



In a study led by researchers at <a href="http://www.ruhr-uni-bochum.de/en">Ruhr-Universität Bochum</a> (RUB), water fleas were kept in the laboratory in the presence of aquatic Utricularia&nbsp;plants (bladderworts) to investigate whether they have any defenses against this carnivorous plant.&nbsp;



The team, headed by Dr. Sebastian Kruppert, Dr. Martin Horstmann and Professor Ralph Tollrian from RUB, in collaboration with Professor Thomas Speck from the Freiburg Botanical Garden and Simon Poppinga from the Technical University of Darmstadt, describe their findings in the <a href="https://www.mdpi.com/journal/ijms">International Journal of Molecular Sciences</a>.



The researchers began by collecting water fleas, a type of small crustacean, from a site where they naturally occurred alongside bladderwort (Utricularia x neglecta) plants. The water fleas were kept in the laboratory, where they reproduced by parthenogenesis, forming offspring that were all genetically identical. Some of the water fleas were then placed in conditions with no Utricularia present, while others were cultured alongside the carnivorous plants, but separated by a fine mesh so that they would not be eaten.



Although the water fleas did not come into contact with the plants, they could detect the presence of the plants by virtue of chemical signals in the water. Under these conditions, water fleas were found to grow longer lateral spines on their carapace, an adaptation that may have made them more likely to get stuck in the entrance of a bladder rather than being sucked inside it and digested.



In addition, the researchers found that water fleas living in the presence of the plants swam along more slowly than those that grew up without the plant. Since the trigger hairs are set off by the movement of water currents produced by passing prey, swimming more slowly would be less likely to trigger the trapdoor and the suction action of the bladder.&nbsp;



Since the water fleas were all genetically identical, these changes in morphology and behavior were induced by the presence of the plants, and not by genetic differences. “This shows that the otherwise genetically identical animals only activate defenses when they need them because they grow up side by side with the plants,” said Dr. Kruppert.&nbsp;



The effectiveness of these changes was tested by the researchers, who counted how often water fleas were sucked into bladders when the two species were kept together in the laboratory. They found that animals that had grown up without the plant were captured more frequently than those that had been previously exposed to the plant and had developed defenses. The adaptations therefore increase the survival rate of water fleas raised in the presence of the plant.&nbsp;



“This indicates that the activatable adaptations are actually defenses against the plant,” said Dr. Kruppert.



“We assume that the appendages let the water fleas grow wider than the diameter of the suction trap entrances,” explained Dr. Horstmann. “The traps are different sizes, but the smaller traps at least can no longer ingest the animals.” Since the water fleas with defenses are also slimmer, the water current can probably flow past them more easily. Moreover, the slower swimming movements probably trigger the traps less often.



"We hadn’t been aware of any other case where animals can defend themselves against attacks from plants. The fact that various defenses such as behavioral adaptations and changes in body structure can simultaneously be observed shows how adaptable and fascinating these tiny animals are," said Tollrian.



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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

Water fleas adapt to life with deadly carnivorous plants

Bladderworts are carnivorous plants that are found in freshwater lakes...

The forces endured by a woodpecker’s <a href="https://www.earth.com/news/habitat-shifts-change-the-brain-structure-of-butterflies/">brain</a> as it hammers away at a dead tree branch must be considerable, or so we always thought. Conventional wisdom has it that the woodpecker’s skull must act as some sort of shock-absorbing helmet and cushion the blows. When a brain experiences sudden deceleration it undergoes compression at the impact site and expansion at the opposite side, both of which can damage neurons and result in injury. And, since woodpeckers don’t seem to suffer brain injuries, the logical inference is that some dissipation of the impact force must occur between the beak and the brain.&nbsp;



New research published today in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a> refutes this long-held notion and finds instead that woodpeckers’ heads act more like stiff hammers than protective helmets. The authors state that hypotheses on shock absorption by the woodpecker’s cranial musculoskeletal system remain untested in natural situations, and would, in fact, run counter to natural selection pressures to increase pecking performance.&nbsp;



The researchers used high-speed video footage of six woodpecker individuals from three species to test whether the deceleration of the brain is significantly reduced compared with the deceleration of the beak upon impact. They analyzed 109 videos of the birds as they hammered into wood, tracking the positions of various markers on the skulls and beaks. The experts found no significant difference between the deceleration of the beak and that of the skull on impact.



“By analyzing high-speed videos of three species of woodpeckers, we found that woodpeckers do not absorb the shock of the impact with the tree,” said Sam Van Wassenbergh&nbsp;of Universiteit Antwerpen, Belgium.



The researchers then used the data collected to model the functional implications of varying the degree of cranial shock. Their biokinetic models included springs between the beak and the brain that could absorb varying amounts of shock and measure the implications of this for hammering performance.&nbsp;



Their simulations confirmed that absorbing part of the kinetic energy of the head into a compressing electric structure during impact significantly reduced the penetration of the beak into the tree. This means that, if a woodpecker’s beak absorbed any of the impact from its pecking action, the bird would actually have to peck harder in order to perform successful pecks. In fact, model birds with cranial shock absorbers would have to expend more energy to peck to a certain depth than those without cranial shock absorbers.



But if their skulls don’t act as shock absorbers, does the furious pecking put their brains at risk? It turns out that it doesn’t. While the deceleration shock that causes concussion in monkeys and humans is around 103 kPa at the site of impact, hammering woodpeckers experience only between 40 and 60 percent of this pressure, depending on species. This means these species would need to hit their selected spot twice as fast as observed or strike at its top speed on wood that is four times as stiff to suffer a concussion, state the authors.



“The absence of shock absorption does not mean their brains are in danger during the seemingly violent impacts,” said Van Wassenbergh. “Even the strongest shocks from the over 100 pecks that were analyzed should still be safe for the woodpeckers’ brains as our calculations showed brain loadings that are lower than that of humans suffering a concussion.”



Van Wassenbergh says that woodpeckers could make a mistake, for instance if they were to peck on metal at full power. But their usual pecking on tree trunks is generally well below the threshold that causes a concussion, even without their skulls acting as protective helmets. They are known to have smaller brains and less cerebrospinal fluid around the brain, which are factors that could also protect their brains during impacts.



The findings refute the long-held theory of shock absorption, which has been popularized in the media, books, zoos, and more, noted Van Wassenbergh. “While filming the woodpeckers in zoos, I have witnessed parents explaining to their kids that woodpeckers don’t get headaches because they have shock absorber built into their head. This myth of shock absorption in woodpeckers is now busted by our findings.”



Van Wassenbergh and colleagues conclude that the heads of woodpeckers function as stiff hammers during pecking, and that this ensures maximum penetration of the wood at each peck. They emphasize that, from an evolutionary point of view, there may well be limits to the head size, maximal strike speed and hardness of trees selected by woodpeckers.



The findings also have some practical implications, adds Van Wassenbergh, given that engineers have previously used the anatomy of the woodpecker’s cranial skeleton as a source of inspiration for the development of shock-absorbing materials and helmets. The new findings show that’s not such a good idea, given that woodpecker anatomy actually negates shock absorption.



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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

Woodpecker skulls do not absorb the shock of hammering

The forces endured by a woodpecker’s brain as it hammers...

With the worldwide increase in levels of <a href="https://www.earth.com/news/obesity-is-the-epidemic-crisis-of-our-time/">obesity</a> since the 1960s, studies have often focused on people who have a higher energy intake than their total <a href="https://www.earth.com/news/biden-moves-to-phase-out-energy-inefficient-light-bulbs/">energy</a> expenditure. Such people are characterized by having a high body mass index (BMI), calculated by dividing mass (in kg) by height squared (in m).&nbsp;



Body mass index is a useful indicator of those who are overweight (BMI of 25.0–29.9) or obese (BMI &gt; 30), in comparison with those who have a normal weight for their height (BMI 18.5–24.9). However, there is a population of healthy underweight people who feature at the very low end of the BMI curve and they have seldom been studied.



Little is known about the lifestyles, physiology, metabolic rates or genetics of people who have very low BMI values. It is sometimes said of them that they can “eat what they like” without gaining weight, and this is explained potentially by their high levels of physical activity or food-associated thermogenesis.&nbsp;



A new study by scientists from academic institutions in China and Scotland has tested the hypothesis that the leanness of healthy underweight people is due to their higher levels of physical activity, higher resting energy expenditure and higher total energy expenditure. The researchers recruited 173 people in the normal BMI range and 150 healthy underweight people with BMI values of less than 18.5, in order to compare their lifestyles, physiology and genetics.&nbsp;



The experts used established questionnaires to screen out people with eating disorders as well as those who said they intentionally restricted their diets and those who were infected with HIV. They also excluded individuals who had lost weight in the past six months potentially related to illness, or were on any kind of medication. They did not rule out those who said they “exercised in a driven way,” but only 4 of the 150 said that they did.&nbsp;



The participants’ food intake was monitored for two weeks and their total energy expenditure was calculated using an isotope-based technique called the doubly-labeled water method. This technique assesses energy expenditure based on the difference between the turnover rates of hydrogen and oxygen in body water as a function of carbon dioxide production. Their physical activity was measured using an accelerometry-based motion detector. Other physiological variables, such as cholesterol levels and levels of thyroid hormones were also measured from the participants’ blood.



The results, published today in the journal <a href="https://www.cell.com/cell-metabolism/home">Cell Metabolism</a>, show that healthy underweight people are not more physically active than people with a normal BMI. In fact, the underweight people were 23 percent less active than the participants with normal range BMIs. Despite the fact that their energy expenditure due to physical activity was lower than expected, their overall total energy expenditure was higher than expected. This was due to the fact that underweight individuals had fast metabolic rates while they rested, and this used up more energy than expected.&nbsp;



“We expected to find that these people are really active and to have high activity metabolic rates matched by high food intakes,” said study co-author John Speakman, a professor at the Shenzhen Institutes of Advanced Technology in China and the University of Aberdeen in the UK. “It turns out that something rather different is going on. They had lower food intakes and lower activity, as well as surprisingly higher-than-expected resting metabolic rates, linked to elevated levels of their thyroid hormones.”



The underweight participants ate 12 percent less food than the normal weight group, although this was not less than they would be expected to consume based on their low body weights.&nbsp; They also had significantly lower levels of free triglycerides and low-density (bad) lipoprotein cholesterol, while the levels of high-density (good) lipoprotein cholesterol and thyroid hormones were significantly higher. The authors state that the underweight individuals were metabolically healthier than the normal individuals, based on the levels of these substances.&nbsp;



“Although these very lean people had low levels of activity, their markers of heart health, including cholesterol and blood pressure, were very good,” said study first author Sumei Hu. “This suggests that low body fat may trump physical activity when it comes to downstream consequences.”



The researchers acknowledge some limitations to this research, including the fact that although they measured food intake, they didn’t measure what the participants were actually eating or their feelings of satiation or satiety.



The team is now expanding its research to include studies of these measures. They also plan to look at genetic differences between normal weight and healthy underweight individuals. Preliminary analysis suggests single nucleotide polymorphisms in certain genes that might play a role. When these genetic changes were replicated in mice, the animals had some aspects of the phenotype that was observed in human subjects.



“The next stage is to understand more about the phenotype itself and understand the mechanisms that generate it more clearly,” said Speakman.



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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

Healthy underweight people are actually less active

With the worldwide increase in levels of obesity since the...

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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

[sendtonews key="0ynNMYkMKa-2340414-12187" 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> (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.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&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.

Kainji Lake in north central Nigeria

[sendtonews key="iuA5mpp3jv-1641775-12187" 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.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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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.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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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

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

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

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



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



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Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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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



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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://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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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.

Wetlands are a major source of methane emissions

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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



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 rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

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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.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&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.

How the immune system responds to injury

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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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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2022 illustrated the consequences of a warming climate

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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"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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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...