摘要
PEOPLE have been marrying out-side their'own culture"for as long as they've been able to ut-ter the phrase"I do."In fact,thepresence of Neanderthal DNA in-ali"hu-man populations outside Africa-up to three percent in some"modern"Europe-ans-has led some scientists to suggest that the first Homo sapiens to stroll off the Savanna even paired off with their cousin-species,for whom pronouncing"I do"would have been something of a laryngeal impossibility.
