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Dinosaurs -- Cardiovascular system.

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View Resource Talk of the Nation, Science Friday 04/21/2000

This resource refers to the recent discovery of a fossilized dinosaur heart that was reported in the April 21, 2000 issue of the Journal Science. This heart of a small herbivore called a Thescelosaurus reveals a structure "more like that of a bird or a mammal than those of reptiles, adding substantially to evidence suggesting that at least some dinosaurs had high metabolic rates." This audio...

http://www.npr.org/ramfiles/totn/20000421.totn.02.rmm