The Mystery of Twin Town

CÂNDIDO GODÓI, Brazil — In this farming town, populated almost entirely by German-speaking immigrants, the question lingers...Why is it that one in five pregnancies has resulted in twins, when the usual rate is one in 80? Even more peculiarly, most of the twins are blue-eyed blonds.
The mystery has persisted for decades, attracting international attention and inspiring books and investigations by geneticists.
Some researchers have suggested the darker possibility that Josef Mengele, the Nazi physician known as the Angel of Death, was involved. Mengele, residents say, roamed this region of southern Brazil, posing as a veterinarian, in the 1960s, about the time the twins explosion began.
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