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

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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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If visions of this impending heat death disturb you, researchers from the California Institute of Technology have some good news.

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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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As our sun matures it grows brighter and hotter.

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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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Thinning out the CO2 that blankets the earth helps to keep things cool.

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But that can't go on forever because we'd be left with no blanket at all.

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Now the Caltech scientists say that the planet may be able to compensate by removing nitrogen from the atmosphere.

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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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So stop and smell the roses.

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We may have an additional billion years to figure out this extreme case of global warming.

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

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