Re: Berlinski and critiques

Arthur V. Chadwick (
Wed, 10 Dec 1997 18:09:49 -0800

You say in your essay:

We can detect natural selection at work; we can measure genetic drift and gene
flow in populations; and we can see the event that Darwin strove to
explain, but never himself witnessed, the production of two species where
once there was but one.

When did we see this and what particular species were involved?