Last Updated: Tuesday, July 23, 2013, 15:07
A new study suggests that life on land is four times as old, pushing the date back to 2.2 billion years ago than earlier believed - almost half way back to the inception of the planet.
Last Updated: Friday, December 14, 2012, 10:35
A study suggesting that life may have first emerged on land about 100 million years earlier than previously thought, has sparks anger among scientists.
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