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When a Washington man failed a paternity test, he was understandably concerned. That concern undoubtedly increased when he was told that it was his twin who was the father of his child—especially since the man had no twin. At least not one that was ever born.

The man is a chimera, a person who has two distinct sets of DNA. In this case, the man had absorbed the genes of his twin in the womb. It is theorized that “vanishing twin syndrome,” where one twin dies and is absorbed by the other, occurs in between 20 and 30 percent of pregnancies with multiple babies. About one in eight single childbirths are thought to start as multiple pregnancies.

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Paul Craig Cobb in Leith, N.D., Aug. 27, 2013. Paul Craig Cobb, a newcomer to Leith, which has a population of about 20 people, has been buying up property in an attempt to transform the town into a colony for white supremacists. (Jenn Ackerman/The New York Times)

The dawning of the age of genetic ancestry tests (GAT) such as 23andme and Ancestry.com seemed as though they would be an inadvertent boon to white supremacists, a way to resurrect a long history of “scientific racism” or illegitimate attempts to prove racial superiority through one or more scientific fields, long considered pseudoscience by actual scientists.

White supremacists espouse a dangerous and foolish ideology that says that “pure” descendants of white Europeans are superior to other races, and that they must somehow recreate a white nation state at the expense of people of color, and those of the Jewish faith, among others. The recent white supremacist protest in Charlottesville, Virginia, which turned violent for many, and fatal for Heather Heyer, showed that these groups are as committed as ever to their vision of terror.

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