New research shows that ancient humans had sex with non human species.
According to a study conducted by Omer Gokcumen, an assistant professor of biological sciences at the University of Buffalo, ancient humans had intercourse with a "ghost species" of "proto human".
Gokcumen explains that humans are only one member of a broader species named "hominins".
The research found that humans had sex with other members of the hominins group.
Gokcumen found "wildly different" genes in DNA of humans living in Sub-Saharan Africa. He believes these genes can be traced back to about 150,000 years ago when ancient humans were breeding with this mysterious "ghost species".