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This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

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You'd think that the asteroid that hit Earth 66 million years ago with enough force to wipe out the dinosaurs would be a tough thing to sleep through.

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But a new study suggests that the ability to engage in extended hibernation might be what saved ancestral mammals from extinction at the end of the Cretaceous.

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The hypothesis is in the Proceedings of the Royal Society (B).

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It's thought that global wildfires engulfed the planet for a year or more after the Chicxulub impact.

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That's a long time to stay out of harm's way.

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Small mammals most likely burrowed underground.

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But could they last that long without coming up for air?

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Yes, if they were hibernating.

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We know that bears can sleep through winter.

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But bunny-sized Madagascar mammals called tenrecs have got that beat.

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Researchers tagged two dozen tenrecs with devices that recorded their body temp.

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And then released' em back into the wild.

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Most of the tenrecs got killed by dogs or snakes or poachers.

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But a couple tunneled into the sand where they proceeded to snooze until the researchers dug them up nine months later.

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The findings reveal that on occasion the best way to make it through a crisis is to just take a long nap.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.

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