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Re: Dinosaurs to birds



In a message dated 1/21/99 10:54:08 PM EST, jbois@umd5.umd.edu writes:

<< Then how do you explain the disappearance of enantiornithines?  More bad
 luck?  >>

Don't have enough information on enantiornithan distribution to explain their
disappearance. If they were abundant right up through the end of the
Cretaceous, then most likely the asteroid did them in, and it was their bad
luck. If they had already disappeared before the end of the Cretaceous, then
they became extinct for another reason or reasons (competition with ornithuran
birds, perhaps). If they were in decline at the end of the Cretaceous, then
the asteroid might have been the coup de grace. Who knows? It's all
speculation.