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Global study reveals time running out for many soils, but conservation measures can help
Researchers found more than 90 per cent of the conventionally farmed soils in their global study were thinning, and 16 per cent had lifespans of less than a century. These rapidly thinning soils were found all over the world, including countries such as Australia, China, the UK, and the USA. The study, led by Lancaster…
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Bronze Age farmers gave preferential treatment to cows over domesticated sheep, goats
Meat and dairy played a more significant role in human diets in Bronze Age China than previously thought. A new analysis also suggests that farmers and herders tended to sheep and goats differently than they did their cows, unlike in other parts of the world — keeping cows closer to home and feeding them the…
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Researchers reveal how to turn a global warming liability into a profitable food security solution
Methane, a powerful greenhouse gas, can be captured and transformed into protein-rich feed for farmed fish — an increasingly important food sector. A new analysis shows how to make the approach more cost-effective than current fish feeds. «Industrial sources in the U.S. are emitting a truly staggering amount of methane, which is uneconomical to capture…
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Importance of teaching children about environmental issues
Environmental education provision needs greater investment and innovation if future generations are to be able to respond fully to the climate emergency, experts have said. The deepening environmental crisis will continue to worsen if there is not significant support and investment in environmental and science education, researchers have warned. Reforms would help young people to…
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Shifting sands, creeping soils, and a new understanding of landscape evolution
A new study finds that piles of sand grains, even when undisturbed, are in constant motion. These experimental results challenge existing theories in both geology and physics about how soils and other types of disordered materials behave. Most people only become aware of soil movement on hillsides when soil suddenly loses its rigidity, a phenomenon…
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Study reveals gophers biofluorescence
You can learn a lot about animals by simply watching them. But some secrets can only be revealed in the dark … with an ultraviolet flashlight. This happens to be the case for pocket gophers, small rodents that live underground in sandy soil. A new paper by University of Georgia researchers found that these feisty,…
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Cracking the secrets of dinosaur eggshells
Since the famous discovery of dinosaur eggs in the Gobi Desert in the early 1920s, the fossilized remains have captured the imaginations of paleontologists and the public, alike. Although dinosaur eggs have now been found on every continent, it’s not always clear to scientists which species laid them. Now, researchers have narrowed down the list…
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Dishing the dirt on an early man cave
Fossil animal droppings, charcoal from ancient fires and bone fragments litter the ground of one of the world’s most important human evolution sites, new research reveals. A team of scientists have used modern geoarchaeological techniques to unearth new details of day-to-day life in the famous Denisova Cave complex in Siberia’s Altai Mountains. The latest evidence…
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Human migration out of Africa may have followed monsoons in the Middle East
A new study by geoscientists and climatologists provides evidence that summer monsoons from Asia and Africa may have reached into the Middle East for periods of time going back at least 125,000 years, providing suitable corridors for human migration. The finding suggested that modern humans, who originated in Africa, began migrating out of the continent…
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Multiphase buffering by ammonia explains wide range of atmospheric aerosol acidity
Anthropogenic ammonia emissions and the water content matter more than dry particle composition for the acidity of atmospheric aerosols in populated regions. A large fraction of particulate matter consists of nitrate, sulfate, and ammonium ions. The formation of these major aerosol components is strongly influenced by aerosol acidity, which varies widely between different regions with…