A Big Brain Was a Good Thing for Ancient Carnivores, New Study Finds

December 6, 2019 • by Esther Robards-Forbes
Yellow bellied weasel

The yellow-bellied weasel, one of the carnivores in the study, first appeared more than 20 million years ago and still exists today. Photo courtesy of Jack2964.


Diagram showing reduction risk in weasels and bears.

Eric Abelson

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