An article published in the journal “Science Advances” reports the traces of an interbreeding between the ancestors of Neanderthals and Denisovans with a population belonging to another species of hominins called superarchaics because they probably separated from other humans about 2 million years ago. A team of researchers led by anthropologist Alan Rogers studied the ways in which mutations are shared between various populations of Homo sapiens, Neanderthals and Denisovans, concluding that certain sharing patterns indicate that there were five episodes of interbreeding between species including the one occurred over 700,000 years ago between superarchaic hominins and ancestors of Neanderthals and Denisovans.