This all sounds very fascinating, but I think it's nonsense. Mengele is given a status of somekind of an über-doctor. There is no way he was able to inflict by some elixirs or drugs to the human dna. It sounds possible to produce twins in one pregnancy, but genetical changes that inflicts later generations sound extremely unlikely. Nazi-Germany wasn't posessing any weird scifi-space-age-technology. They lost the war. Mengele was a person I don't give any appreciation of his merits. He ought to be remembered not from the smily blue-eyed Brazilian kids, but from the numerous tortured and killed souls of Auschwitch.