What a set of serrated teeth could tell us about ancient ecology

Dimetrodon's chompers are a window into the past

Reptile
(Image credit: (Bettmann/CORBIS))

"Show me your teeth," the 19th-century zoologist Georges Cuvier once said, "and I will tell you who you are." Across the animal kingdom, the shape of a creature’s teeth correlates with its diet and feeding behavior. As such, a simple change in tooth structure can reveal larger changes in the animal's food web and ecosystem.

Scientists from the University of Toronto recently found just such a change, in the mouth of one of our distant cousins.

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