Once the inhabitants had settled in, time seems to have stood still in Lepenski Vir. Study of the bones found there shows that there was no admixture of foreign population; the same people remained on the spot, intermarrying generation after generation, perhaps 120 generations in all - well over 2,500 years. During all that time they remained healthy. (Did they, like the ancient Greeks, toss aside the infants that did not live up to their sturdy standards?) There are no deformed or diseased bones here, and the women were so robust that it is hard to tell their skeletons from...