Oldest known comet impact on Earth found in Greenland
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Oldest known comet impact on Earth found in Greenland

Copenhagen : Denmark | Jun 29, 2012 at 12:58 AM PDT
Source: Zee News
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The spectacular craters on the Moon formed from impacts with asteroids and comets between 3 and 4 billion years ago. The early Earth, with its far greater gravitational mass, must have experienced even more collisions at this time but the evidence has been eroded away or covered by younger rocks. FULL ARTICLE AT Zee News
 
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