February 11, 2003 A Prolific Genghis Khan, It Seems, Helped People the WorldBy NICHOLAS WADE remarkable living legacy of the Mongol empire has been discovered by geneticists in a survey of human populations from the Caucasus to China. They find that as many as 8 percent of the men dwelling in the confines of the former Mongol empire bear Y chromosomes that seem characteristic of the Mongol ruling house. If so, some 16 million men, or half a percent of the world's male population, can probably claim descent from Genghis Khan. The finding seems to be the first proof, on...