A large number of the valley networks scarring Mars’s surface were carved by water melting beneath glacial ice, not by free-flowing rivers as previously thought, according to new research. The …read more Source:: Science
Tag: ice sheets
Almost alien: Antarctic subglacial lakes are cold, dark and full of secrets
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•More than half of the planet’s fresh water is in Antarctica. While most of it is frozen in the ice sheets, underneath the ice pools and streams of water flow …read more Source:: Science
Ice in motion: Satellites capture decades of change
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•New time-lapse videos of Earth’s glaciers and ice sheets as seen from space — some spanning nearly 50 years — are providing scientists with new insights into how the planet’s …read more Source:: Science
Tectonics in the tropics trigger Earth’s ice ages
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•Over the last 540 million years, the Earth has weathered three major ice ages — periods during which global temperatures plummeted, producing extensive ice sheets and glaciers that have stretched …read more Source:: Science
Study reveals new Antarctic process contributing to sea level rise and climate change
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•A new study has revealed a previously undocumented process where melting glacial ice sheets change the ocean in a way that further accelerates the rate of ice melt and sea …read more Source:: Science
Genomic study reveals clues to wild past of grapes
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•About 22,000 years ago, as the ice sheets that consumed much of North America and Europe began retreating, humans started to consume a fruit that today brings joy to millions …read more Source:: Science
Study shows how water could have flowed on ‘cold and icy’ ancient Mars
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•Research by planetary scientists finds that periodic melting of ice sheets on a cold early Mars would have created enough water to carve the ancient valleys and lakebeds seen on …read more Source:: Science