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Submission + - Mesothermy in Dinosaurs (sciencemag.org)

An anonymous reader writes: An article published today in Science (http://www.sciencemag.org/content/344/6189/1268) points to the possibility that dinosaurs were mesotherms more akin to modern Tuna. Their internal temperature would have been warmer than their surrounding environment, conferring on them the ability to move more quickly than any ectotherm (“cold blooded” animal), but wouldn’t have been constant or as warm as any endoderm (“warm blooded” animal). Their energy use and thus their necessary food intake would have been greater than an ectotherm, but much less than an endotherm. In order to arrive at this possibility, bone growth rings in fossilized bone were used to establish growth rates and then compared to modern ectotherms and endotherms. Nature has a write up on this: http://www.nature.com/news/din...
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Mesothermy in Dinosaurs

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