![](https://webarchive.library.unt.edu/eot2008/20080920093359im_/http://nsf.gov/images/x.gif) News From the Field Extraterrestrial Impact Likely Source of Sudden Ice Age Extinctions
![](https://webarchive.library.unt.edu/eot2008/20080920093359im_/http://nsf.gov/images/greenlineshort2.jpg)
September 24, 2007
![earth and environment graphic](https://webarchive.library.unt.edu/eot2008/20080920093359im_/http://nsf.gov/news/other_images/1earth_enviro_l.gif) | 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. Full story |
Source Brown University ![](https://webarchive.library.unt.edu/eot2008/20080920093359im_/http://nsf.gov/images/bluefadesm.jpg)
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