Evolution: A new theory; rate of speciation (Introduction)

by David Turell , Thursday, May 07, 2015, 15:15 (4085 days ago) @ Balance_Maintained

Tony: Am I the only one that feels the need to point out that geographic differences can ONLY account for land animals? Birds and fish would never be restricted by such things except under relatively extreme circumstances.-You are absolutely correct, but see the article I entered today. It is a much better approach.