Subject: not necessarily
Author:
Posted on: 2009-01-15 17:25:00 UTC

After all, it's not doing any damage. Except appendicitis, and not everyone gets that. What are the odds of spontaneous genetic mutation that means a baby's born missing an entire organ? And even if it is, where's the advantage that'll make that trait spread? Nope, it's much harder to unevolve traits. Once you've got 'em you're stuck with 'em, for the most part.

Does it predate molars then?

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