Greening of the Earth pushed way back in time

[unable to retrieve full-text content]Conventional scientific wisdom has it that plants and other creatures have only lived on land for about 500 million years, but a new study is pointing to evidence for life on land that is four times as old -- at 2.2 billion years ago and almost half way back to the inception of the planet.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/c2OWlGvZPMM/130722141548.htm

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