Evolution: When was life's first branch point?
AbstractA recent analysis of protein sequences from diverse organisms has estimated that all extant species share a common ancestor that lived only 2 billion years ago; but how can this be squared with the fossil evidence that complex cells existed up to 3.5 billion years ago
Publisher: Elsevier Science Ltd.
DOI identifier: 10.1016/S0960-9822(09)00448-5
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