Comet Impacts Triggered Ice Age Extinctions?

Publication: National Geographic News   Date: July 21, 2009   View Article

Rare diamonds found buried on an island near southern California strengthen the controversial idea that comet impacts wiped out huge beasts and an early human culture in North America about 12,900 years ago.

Similar “nanodiamonds” found in sediments across North America were presented earlier this year as proof that space rocks colliding with Earth led to the ancient mass extinction.

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