Over the last two decades, scientists have discovered several more species of humans that were alive at the same time as Homo sapiens. Denisovans split from Neanderthals not long after they’d ventured out of Africa and went on to occupy the eastern part of Eurasia. The only physical traces of this species are a few bone fragments uncovered in caves in the Altai Mountains and on the Tibetan plateau. Anatomically, Denisovans would have looked similar to Neanderthals although they appear to have had much bigger teeth, and they carried a number of gene mutations, including one that affected red
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