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1 .This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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2 .When summer hits, I dread jogging outside.
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3 .But a study finds that elephants can be in true danger in the heat.
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4 .As creatures get bigger, they have smaller surface-area-to-body-volume ratios.
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5 .Fully grown Asian elephants thus pack a lot of mass into a body with a relatively small surface area.
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6 .And surface area limits how much body heat you can dissipate.
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7 .For the study, two female elephants in the Audubon Zoo in New Orleans walked around a half-mile track under various conditions.
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8 .The outdoor temperature during these sessions ranged from a chilly 8 degrees Celsius to a scorching 35 degrees.
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9 .Sunny, hot days were the worst.
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10 .The already limited hide is now itself heated by the sun.
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11 .With the equivalent of a busted radiator, the elephants retained 56 to 100 percent of their body heat internally.
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12 .Which could make a mere four hours of exercise fatal.
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13 .The research on elephant exertion is in the Journal of Experimental Biology.
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14 .Fortunately, elephants have ways to beat the heat:
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15 .shift activity to after dark and, of course, go for a dip.
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16 .Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwic.
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