Photo: Bizarre Dinosaur Grazed Like a Cow, Study Says

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Nigersaurus, an elephant-size dinosaur with a featherweight skull, had hundreds of needlelike teeth that enabled it to graze vegetation like a lawn mower, a new study shows.

The research reinforces recent thinking that so-called diplodocoid sauropods, such as Nigersaurus's North American cousin Diplodocus, were predominately ground feeders.

Illustration courtesy Tyler Keillor/Photo by Mike Hettwer, courtesy of Project Exploration© 2007 National Geographic

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