Scientists find evidence of 'ghost population' of ancient humans

Traces of unknown ancestor emerged when researchers analysed genomes from west African populations

Scientists have found evidence for a mysterious "ghost population" of ancient humans that lived in Africa about half a million years ago and whose genes live on in people today.

Traces of the unknown ancestor emerged when researchers analysed genomes from west African populations and found that up to a fifth of their DNA appeared to have come from the missing relatives.