DNA Sequencing Reveals Startling Recent Human Evolutionary Complexity

 DNA sequencing shows that there were four human 'species' living and interbreeding in Europe and Asia 50,000 years ago, as opposed to the two species that were recognized as recently as ten years ago as the only species of the genus Homo. In addition it showed that there was an identifiably separate version of Homo sapiens sapiens living in Australia, who left Africa 70,000 years ago, at least 20,000 years before anyone believed the Homo sapiens exodus had begun.   link