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RE: Dinosaurs to birds



Or (somewhat alternately): birds were sufficiently derived (in some way) to
survive the KT extinction.  This is whether a bolide was the cause or just a
contributor.  Some evolutionary adaptation that was present in Cretaceous
birds, but not present in Cretaceous non-avian dinosaurs gave birds an edge
(in this case).

Dwight

        -----Original Message-----
        From:   Dinogeorge@aol.com [SMTP:Dinogeorge@aol.com]
        Sent:   Thursday, January 21, 1999 4:06 PM
        To:     Alien4240@aol.com; dinosaur@usc.edu
        Subject:        Re: Dinosaurs to birds

        In a message dated 1/21/99 4:48:33 PM EST, Alien4240@AOL.COM writes:

        << I have a question which is probably elementary, but if all the
dinosaurs
        died
         when a comet (or asteroid) hit the earth, then how did they evolve
into
        birds? >>

        Birds had already evolved before the asteroid impact; the impact
destroyed the
        dinosaurs and certain other life forms but didn't wipe out the birds
        completely. They're all that's left of the dinosaurs.