R
RandomAlias
Guest
I am not talking about similar body plans for similar habitats, like the similarity between swallows and bats which feed by catching flying insects. Birds and dinosaurs are similar in a more fundamental way, their respiratory system, which is so radically different from that of amphibians, reptiles, and mammals that it requires specific skeletal structures like air passages in certain vertebrae. Birds and dinosaurs have it. Just a coincidence, right?
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