Our ideas about how crocodiles evolved have just taken a battering. It seems that these cold-blooded creatures, with their limited capacity for prolonged activity, might have had active, warm-blooded ancestors.
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Summers, A. Warm-hearted crocs. Nature 434, 833–834 (2005). https://doi.org/10.1038/434833a
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DOI: https://doi.org/10.1038/434833a
