You thought not -- what?
You assert it has been proved "scientifically" -- but provide no specific evidence.
Gorillas are mainly blood type B, minimal O.
Chimpanzees are blood type A, minimal O
Humans have A, B, O, and AB.
Therefore....A and B blood types EITHER spontaneously mutated in different species AFTER humans, gorillas, and chimpanzees separated on our common ancestral tree, OR A and B existed in the common ancestor of humans, chimpanzees, and gorillas. With me so far?
Secondly, AB blood is common in the Ainu people (18%). These are the aboriginal people of Japan. They were there way before the Japanese (who came from Korea). It is also close to 10% in the Japanese, Koreans, and Chinese around Bejing. With me so far?
Okay. CLEARLY AB blood is NOT a recent development. NOT. It probably (and I say probably) originated among the Ainu and spread from there.
Follow the link: [www.bloodbook.com]
and see the distribution in current populations.
Finally, the concept that type O blood is the most common blood type is true for the USA and the UK -- but NOT necessarily for the rest of the world. For example, it is NOT true that type O is most common for:
Ukranians, Tartars, Swiss, Swedes, Spanish, Serbians, Russians, etc. The list goes on. Those are the scientific facts.
The old assertion that "type O was the original blood type" holds no water whatever. It is simply wrong. As for AB - yes, clearly it is a more recent development. But there is zipola evidence that it occured in the last thousand years or so.