This image shows the fossilized skull of the infamous saber-toothed Lycaenops, a predator that existed during the late Permian. The Lycaenops was a therapsid, or "mammal-like" reptile. The research team studied organisms like the Lycaenops in order to understand how ecological communities recovered after one of Earth's largest-ever mass extinctions. Credit: Michael Benton
01/14/09
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