Scientists recently discovered that the 90,000-year-old bone flake remains found in a Russian cave are that of a female prehistoric teen hybrid—a female whose mother was Neanderthal and whose father was a completely different species of extinct human called Denisovan.
According to BBC News:
Neanderthals and Denisovans were humans like us, but belonged to different species.
The BBC interviewed Viviane Slon, a researcher at the Max Planck Institute for Evolutionary Anthropology (MPI-EVA) in Leipzig, Germany, who said:
We knew from previous studies that Neanderthals and Denisovans must have occasionally had children together. But I never thought we would be so lucky as to find an actual offspring of the two groups.