@Tiercel, I came across this first in one of David Icke's book. Then I tried to search about it on internet and don't know huw much of it is true or not. I guess the mystery of this Rh factor occurence hasn't been solved yet by scientists either. It can be only speculated on it's origin and how it came about, what happened in the past. Of course there is a lot of crazy hypotheses on the web but it doesn't mean they may not contain a grain of truth. I personally read everything, but don't make any conclusions. It means I don't believe anything as if it was certain, but don't reject it either, just observe.
As for the 2n part of your quote, I have to check yet if I have extra vertebra, but some people really do have it. My uncle for example. I have lower body temperature (about 36 Celsius), and lower blood pressure. Psychic occurences I had plenty, under some conditions. I wrote about it also on here in the past. But I don't have any special abilities, except of disrupting the devices

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There are some links
Rh blood group system - Wikipedia, the free encyclopedia
How the Neanderthals became the Basques
"The Rh-negative Factor:" "Reptilian Traits": - David Icke's Official Forums