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1 .This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .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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3 .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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4 .The hypothesis is in the Proceedings of the Royal Society (B).
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5 .It's thought that global wildfires engulfed the planet for a year or more after the Chicxulub impact.
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6 .That's a long time to stay out of harm's way.
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7 .Small mammals most likely burrowed underground.
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8 .But could they last that long without coming up for air?
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9 .Yes, if they were hibernating.
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10 .We know that bears can sleep through winter.
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11 .But bunny-sized Madagascar mammals called tenrecs have got that beat.
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12 .Researchers tagged two dozen tenrecs with devices that recorded their body temp.
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13 .And then released' em back into the wild.
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14 .Most of the tenrecs got killed by dogs or snakes or poachers.
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15 .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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16 .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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17 .Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.
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