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Comment Sorta (Score 5, Insightful) 84

They took present-day versions of the protein in living organisms, used a computer to interpolate a hypothetical common ancestor, then 'found' sequence homology - but people already knew the sequence was highly conserved, it's evident in modern organisms. There were no "fossils" involved. And conserved sequences make for poor molecular clocks, so who knows if it was 4 billion years ago.

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