Friday, June 18, 2010

Dinosaurs Alive!


Dinosaurs Alive!, originally uploaded by njchow82.
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The dinosaurs above have been considered three species (from left: Dracorex hogwartsia, Stygimoloch spinifer and Pachycephalosaurus wyomingensis). But a new analysis of fossil skulls led by the University of Montana suggests they're different life stages of P. wyomingensis, whose horns disappear and dome head grows over time. The find fuels speculation that up to a third of recognized dinosaur species are in fact juvenile forms of other species.

Source Citation
Bensen, Amanda, et al. "Dinosaur species vanish!" Smithsonian Jan. 2010: 6. Academic OneFile. Web. 18 June 2010.
Document URL

Gale Document Number:A216196976

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