Early Humans Slept With a Mysterious Ancestor

The inhabitants of the Andaman Islands, in India, carry DNA from a mysterious human species

Illustration by Maurice Wilson showing ancient humans using fire and preparing tools (Wikimedia Commons)

In recent years, the history of our species has become a very interesting film of sex and miscegenation. First we find out that Homo sapiens and Neanderthals were not the two isolated species as thought, because repeatedly they went to…