@CNN: Neanderthals, Denisovans and our ancestors were mixing and mingling a long time ago — and some of our genetics can be traced back to these archaic humans https://t.co/Ffiy9ub7Rj

@CNN: Neanderthals, Denisovans and our ancestors were mixing and mingling a long time ago — and some of our genetics can be traced back to these archaic humans https://t.co/Ffiy9ub7Rj