Scientists have uncovered a huge 31-kilometre-wide crater deep below the ice sheets in northwest Greenland. The crater was formed as a result of the impact of an iron meteorite less than three ...
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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.
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