News From the Field
Extraterrestrial Impact Likely Source of Sudden Ice Age Extinctions
September 24, 2007
What killed the wooly mammoths? An international team of scientists, including Peter Schultz of Brown University, suggests that a comet or meteorite exploded over the planet roughly 12,900 years ago, causing the abrupt climate changes that led to the extinction of the wooly mammoth and other giant prehistoric beasts. Their theory is published in the Proceedings of the National Academy of Sciences.
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