Image credit: Wikimedia Commons The last great extinction occurred sixty five million years ago. You can visit the exact point on earth where it started, on the Yucatan peninsula of Mexico. The Chicxulub crater , more than 110 miles in diameter, was formed by the enormous impact of a meteor the size of San Francisco hitting the earth. Life on earth changed radically from that moment of impact…. Read the full story on TreeHugger
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Tracking the Extinctions and Adaptations Around Us
