Recall that thermoregulation represented a revolutionary advance for mammals, profoundly altering their bodies, their brains and the network of connections between the two; and that it proved particularly so for early humans, whose superior ability to cool their bodies gave them an edge on the African savannah. Some scientists have even claimed that the nervous system supporting thermoregulation in mammals laid the foundation for later systems of emotional arousal. Dienstbier has elaborated this idea, and argues that people who have developed cold tolerance may also have increased their
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