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1 .This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .About a billion years from now, some scientists say, the sun will be too bright for comfort, and our formerly hospitable planet will no longer be able to support life.
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3 .If visions of this impending heat death disturb you, researchers from the California Institute of Technology have some good news.
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4 .Their calculations add at least another billion years to Earth's expiration date, results published in the Proceedings of the National Academy of Sciences.
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5 .As our sun matures it grows brighter and hotter.
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6 .And over the past three or four billion years, the Earth's been coping with the extra rays by getting rid of some of the CO2 in the atmosphere.
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7 .Thinning out the CO2 that blankets the earth helps to keep things cool.
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8 .But that can't go on forever because we'd be left with no blanket at all.
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9 .Now the Caltech scientists say that the planet may be able to compensate by removing nitrogen from the atmosphere.
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10 .That'll decrease atmospheric pressure, which will then loosen the weave of the CO2 blanket and allow more heat to escape.
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11 .So stop and smell the roses.
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12 .We may have an additional billion years to figure out this extreme case of global warming.
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13 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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