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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?


To: TigerPaw who wrote (62679)11/14/2014 10:02:52 AM
From: Brumar89  Read Replies (1) | Respond to of 69300
 
change brought about by cooling - warming results more in migration than the kind of isolation that would result in a new species

Migration is facilitated by the melting of glaciers. But the glaciation DID result in isolating populations. After the glacial boundaries broke down, THEN migration of new species like the wisent into NO could occur where they replaced the longhorned bison that had been here before.