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Birds, dinosaurs, and digit 1

Alan Feduccia, chair of biology at University of N.C., Chapel Hill, is
co-author of an article in Science stating that microscopic examination of
bird embryos shows no sign of digit 1, even in vestigial form. "We consider
this unequivocal evidence that birds" did not evolve from dinosaurs. Reason:
Dinosaurs had digits 1, 2, and 3; birds have digits 2, 3, and 4, with no sign
of a digit 1, even in embryos.

Reactions:  Mark Norell, American Museum of Natural History, NYC -- "There is
a discrepancy between what the embryology tells us and what the fossils tell
us. No one feature, such as a thumb, can sway things one way or another.
Storrs Olson, Smithsonian -- This "is the end of it as far as I am concerned.
There is no way that birds and dinosaurs could be directly related."

How does this research relate to Birds Came First?