Dollo's Law...
... appears to be more, well, a guideline.
http://www.sciencedaily.com/releases/2011/05/110511162538.htm
Dan'l Danehy-Oakes
Index · 3 messages · 3 voices · 16 May 2011
Continues in “Dollo's Law” → 2 messages, from 17 May 2011
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