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Post subject: Environment News Comet Impacts Triggered Ice Age Extinctions  Posted: Fri Jul 24, 2009 9:36 am |
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Comet Impacts Triggered Ice Age Extinctions?
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.
* Mass Extinction Facts
* Comet Wiped Out Early ...
Read more : Environment News Comet Impacts Triggered Ice Age Extinctions | Views : 391 | Replies : 0
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