Human blood types have deep evolutionary roots ScienceNews: A new analysis suggests that the A, B and O blood types in people evolved at least 20 million years ago in a common ancestor of humans and ...
Chimpanzees and bonobos have mainly type A blood, while orangutans have A, B, AB, and O. Gorillas, however, appear to have blood types that do not fit the ABO system. In all great apes, red blood ...
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