Sorry, I just can't believe that I'm actually somewhat normal! In general, about 40 — 45% of Europeans have the Rh-negative group.
Both benevolent and malevolent extraterrestrials have been involved with this planet for millions of years, and they have never left this planet.
But not all humans were a result of interbreeding.
I think this may have come about due to more research that has been done in third world countries, and in areas of the world where scientist had no communications with data.