An unidentified ancestor that interbred with humans may have been Homo erectus (skull shown here). (Image: © Shutterstock)
https://www.livescience.com/mystery-ancestor-mated-with-humans.html
An unidentified ancestor that interbred with humans may have been Homo erectus (skull shown here). (Image: © Shutterstock)
https://www.livescience.com/mystery-ancestor-mated-with-humans.html