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Archeologists have rediscovered a pre-Hispanic fresco depicting mythological scenes in northern Peru that they had only seen in black and white photographs that were more than a century old. “It’s an exceptional discovery, first of all, because it is rare to unearth wall paintings of such quality in pre-Columbian archeology,” said Sam Ghavami, the Swiss
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We’re putting more and more satellites into orbit, and along with all the welcome technological and scientific advances that brings, there are also potential problems. Intended to be the start of an orbiting communications network that can be accessed by standard smartphones, the recently launched prototype BlueWalker 3 satellite is now one of the brightest
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Earth is about 29 percent land and 71 percent oceans. How significant is that mix for habitability? What does it tell us about exoplanet habitability? There are very few places on Earth where life doesn’t have a foothold. Multiple factors contribute to our planet’s overall habitability: abundant liquid water, plate tectonics, bulk composition, proximity to
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Is there anything good about volcanoes? They can be violent, dangerous, and unpredictable. For modern humans, volcanoes are mostly an inconvenience, sometimes an intriguing visual display, and occasionally deadly. But when there’s enough of them, and when they’re powerful and prolonged, they can kill the planet that hosts them. Modern-day Venus is a blistering hellscape.
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Rising levels of carbon dioxide in Earth’s atmosphere could exacerbate efforts to clean up our increasingly cluttered shell of orbiting space junk. According to two new studies, the greenhouse gas has significantly contributed to the contraction of the upper atmosphere. This contraction has been hypothesized for decades; now, for the first time, it’s been actually
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Fast-melting glaciers are releasing staggering amounts of bacteria into rivers and streams, which could transform icy ecosystems, scientists warn. In a study of glacial runoff from 10 sites across the Northern Hemisphere, researchers have estimated that continued global warming over the next 80 years could release hundreds of thousands of tonnes of bacteria into environments