Research NewsPaleontology

Were Dinos Cold-Blooded After All? The Nose Knows

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Science  03 Nov 1995:
Vol. 270, Issue 5237, pp. 735-736
DOI: 10.1126/science.270.5237.735


The debate over the origins of endothermy—and whether or not dinosaurs were warm-blooded—has blown hot and cold for years, hampered by the lack of clear-cut evidence. But bones in the nose that are essential for conserving water and heat in endotherms seem completely lacking in dinosaurs, and many researchers say this indicates the extinct animals couldn't have been warm-blooded.