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Hibernation is one of nature’s coolest adaptations, and it’s part of the survival playbook for a wide range of creatures, from primates such as lemurs to a host of reptiles, birds, and insects. The ...

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Today’s most elderly bats aren’t supposed to exist. Ounce for ounce and pound for pound, they are categorically teeny mammals; according to the evolutionary rules that hold across species, they should ...