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Top Ten Dinosaur and Fossil Finds: Most Viewed of 2009

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Ambrosia
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« on: December 24, 2009, 04:26:49 am »

A Third of Dinosaur Species Never Existed?
Brian Handwerk
for National Geographic News
October 9, 2009


ON TV Dinosaurs Decoded, airs Sunday, October 11 at 9 p.m. ET/PT on the National Geographic Channel. Preview Dinosaurs Decoded >>

Many dinosaurs may be facing a new kind of extinction—a controversial theory suggests as many as a third of all known dinosaur species never existed in the first place.

That's because young dinosaurs didn't look like Mini-Me versions of their parents, according to new analyses by paleontologists Mark Goodwin, University of California, Berkeley, and Jack Horner, of Montana State University.

Instead, like birds and some other living animals, the juveniles went through dramatic physical changes during adulthood.

This means many fossils of young dinosaurs, including T. rex relatives, have been misidentified as unique species, the researchers argue.
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