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For two such widely independent species,it could even mean independent evolution of that collagen makeup


@zazang
Just to give you an idea:
Of all the organisms in the sequence database, the one that matched T. rex the closest was the chicken. Now, before assuming that this would be strong evidence that birds are related to dinosaurs, it must be put into perspective. The sequence similarity between the T. rex and the chicken was 58% ,while it was only 51% similar to both frogs and newts. This compares with a reported 81% similarity between humans and frogs, and 97% between humans and cows.