Life on Earth to end in about 2.8B years, study suggests

10/28/2013 | National Geographic News (free registration)

In 2.8 billion years, only the toughest microbes will be left on Earth, as the sun ages and gets increasingly warmer, according to a study by astrobiologists at the University of St. Andrews in Scotland. The scientists measured temperature, and the abundance of water and food to determine how and when life on Earth might die off, noting that as Earth's temperature slowly rises, the level of carbon dioxide will decrease and start killing off plants, beginning in some 500 million years.

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