Chinese scientists have found the genetic marker for congenital generalized hypertrichosis terminalis (CGHT), a disorder that is often referred to as “werewolf syndrome.” Those who suffer from the hereditary disease are typified by thick, dark hair that grows all over the body and face. They may also have “a broad, flat nose, large ears, a large mouth, and thick lips, and, occasionally, an enlarged head and jaw.” [Science] Other than the fact that it is hereditable, the source of the disorder has been a mystery until now. The fact that it is so highly hereditable points to a likely suspect:...