Monday 10 December 2018
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wn.com - 26 days ago

Massive Asteroid Crater Detected Under Greenland Ice Sheet

An unusually large asteroid crater measuring 19 miles wide has been discovered under a continental ice sheet in Greenland, Gizmodo reports. Roughly the size of Paris, it’s now among the 25 biggest known asteroid craters on Earth. An iron-rich asteroid measuring nearly a kilometer wide (0.6 miles) struck Greenland’s ice-covered surface at some point between 3 million and 12,000 years ago, according to a new study published today in Science Advances. The impact would’ve flung horrific amounts of water vapor and debris into the atmosphere, while sending torrents of meltwater into the North Atlantic — events that likely triggered global cooling (a phenomenon sometimes referred to as a nuclear or...

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