17 Interesting video But Rh blood type have never been the missing links... (www.youtube.com) posted 1 year ago by PaulRevere01 1 year ago by PaulRevere01 +17 / -0 2 comments share 2 comments share save hide report block hide replies
Actually we do not know medically how there came to be an Rh negative blood type. It looks like it was somehow artificially genetically engineered to make everyone a universal blood donor. Just a theory though.
Monkeys. Hence rhesus.