Life may have begun on Earth

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Life may have begun on Earth 3500 mya

Tantalising evidence that live began on Earth. Or at least this is the first time that life may have possibly indicated its presence through fractionating carbon in rocks of this age. Also some stromatolites possibly first appeared in the geological record at this time. Earth's climate had likely settled down to a similar to the modern range by now.
Source: http://en.wikipedia.org/wiki/Stromatolite (Wikipedia)

Keywords: evolving_earth, geology, fossils, evolution