By now most everyone has heard of how modern humans populated the world. They left Africa and spread. The simplicity of the original model has gotten complicated, though. We now know that moderns interbred with Neanderthals, probably somewhere in the Middle East, and carried a small percentage of Neanderthal DNA with them throughout the world. Adding to the complication is the discovery of Denisovan DNA in certain population groups, most notably in the aboriginal population of Australia. That means that moderns also interbred with Denisovans on their way to Australia.
As more people around the world are tested for their
