Sex in the Stone Age

A fragment of a pinky bone and a tooth twice the size of today's average molar are the only remnants of a species we now know lived at the same time and place as modern humans—and interbred with them. They are a part of us we never knew existed. How do they fit into our biological development as a species?
posted a year ago
Discover interesting videos through awesome gifs you can create, collect, and share! We're almost ready – leave us your email address and you'll be the first to know.