We're Now Pretty Certain Life on Earth Is 3.5 Billion Years Old [Science]

The Earth is 4.5 billion years old. But what about the life that exists on it? We've thought since 2006 that biological activity in the form of stromatolites—ancient layered geological structures—first appeared here 3.5 billion years ago, and now we have even more evidence to prove it. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/vt9LZyKqSEs/were-now-pretty-certain-life-on-earth-is-35-billion-years-old

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