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birds/dino-birds with teeth

Someone was asking me the other day what evolutionary advantage there
could have been for birds to have lost their teeth? (btw Greg Paul's book
is great--just finished it, now I am going back to re-read parts of it)

So I put this question to you -- what advantage could there have been for
birds to have evolved away from having teeth?  I thought that an
interesting question.  Jane D

Noli me rogare; hic ego solum laboro

   Jane P. Davidson Ph.D.  University of Nevada Reno


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