Argentine historian Jorge Camarasa says that after WWII Josef Mengele kept up his genetic research into twins in a small Brazilian town. Unfortunately, it looks like his book, Mengele: The Angel of Death in South America, isn’t available in English.

He claims that Mengele found refuge in the German enclave of Colonias Unidas, Paraguay, and from there, in 1963, began to make regular trips to another predominantly German community just over the border in Brazil – the farming community of Candido Godoi.

And, Mr Camaras claims, it was here that soon after the birthrate of twins began to spiral.

“I think Candido Godoi may have been Mengele’s laboratory, where he finally managed to fulfil his dreams of creating a master race of blond haired, blue eyed Aryans,” he said.

“There is testimony that he attended women, followed their pregnancies, treated them with new types of drugs and preparations, that he talked of artificial insemination in human beings, and that he continued working with animals, proclaiming that he was capable of getting cows to produce male twins.”