GREEN
07/03/2009 05:12 am ET Updated May 25, 2011

Scientists: Earth Could Actually Be Habitable For Another 2.3 Billion Years

The Earth could be habitable for another 2.3 billion years, extending previous estimates of life's horizon by more than 1 billion years.

King Fai Li and his colleagues at Caltech hypothesize that Earth's atmospheric pressure has always varied, and that it could fall in the distant future, keeping Earth from frying for far longer than previous research had shown.

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