February 17, 2012 Dinosaurs once roamed in the vicinity of
Washington D.C. They did not leave very much behind. No one has
found a beautifully articulated skeleton under the city
streets—the city’s most famous dinosaur, “Capitalsaurus,” is
known from only fragments—but paleontologists can use isolated
teeth to take a census of which kinds of dinosaurs were present
in the area. In the video posted above, the Smithsonian National
Museum of Natural History’s dinosaur curator Matthew Carrano
explains how paleontologists identify dinosaurs on the basis of
teeth alone. Sign up for our free email newsletter and receive
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