The genome of Neanderthals contained harmful gene variants that made them around 40 percent less reproductively fit than modern humans. And non-Africans inherited some of this genetic burden when they interbred with our extinct cousins, say genetic researchers. Neanderthal. Image credit: Trustees of the Natural History Museum, London. Several previous studies revealed that Neanderthals were much more inbred and less genetically diverse than modern...
