Nineteen species of mammals live longer than humans, given their body size, of which 18 are bats. A new study takes a careful look at bat aging and finds, at a time when most species are shutting down genes that help keep cells and tissues healthy, bats are cranking them up.

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Nineteen species of mammals live longer than humans, given their body size, of which 18 are bats. A new study takes a careful look at bat aging and finds, at a time when most species are shutting down genes that help keep cells and tissues healthy, bats are cranking them up.