The Queen of Sheba

What is the reason that the Yorubas of Nigeria are so high in rh negative blood?

The Yoruba Ijebu clan of Ijebu-Ode, Nigeria, claim that she was a noblewoman of theirs known as Oloye Bilikisu Sungbo, which is similar to the name mentioned in the Quran, Balqis. They also assert that a medieval system of walls and ditches, built sometime around the 10th century, was dedicated to her. After excavations in 1999 the archaeologist Patrick Darling was quoted as saying, “I don’t want to overplay the Sheba theory, but it cannot be discounted… The local people believe it and that’s what is important… The most cogent argument against it at the moment is the dating.”

https://en.wikipedia.org/wiki/Sungbo%27s_Eredo
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