New research shows that when an asteroid slammed into the moon billions ... digging out two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes. The latter, by comparison ...
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Crater Three Times Larger Than the Grand Canyon Found in the U.S.Spanning 25 miles in diameter, this crater is three times the size of the Grand Canyon, making it the largest known impact site in the U.S. and the 15th largest on Earth. The asteroid’s ...
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