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A comment on New finding: 600M years ago, a single mutation changed everything. Parent comment

Re:New finding: 600M years ago, a single mutation changed ev... by InclinedPlane on Monday January 11, 2016 @06:03PM (#10884306)
From 1 to 2 you get directionality. 2 to 3 improves directionality a great deal (it's basically a continuum from depression to pinhole eye).
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