Why do they say that the tyrannosaurus rex is a long ancient ancestor of modern day chickens?
Why do they say that the tyrannosaurus rex is a long ancient ancestor of modern day chickens?
Did they determine this by comparing what DNA fragments they've managed to recover, or by physical skeletal structure similarities, or what?
I'm no expert in the field, but I just don't see it.
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This seems to be a decent intro. Basically therapods, of which T-Rex was one, are ancestors of the birds.
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