Current data finds between 1.8 and 2.6 per cent Neanderthal DNA in everyone except those of sub-Saharan heritage;3 but it’s not equally distributed. Western Europeans tend to have the least – 2 per cent or under – while Indigenous Americans, Asians and Oceanians, including Aboriginal Australians and Papuans, have up to a fifth more. We now also believe that there were multiple interbreeding episodes,
