Early human interbreeding with our “cousins” the Denisovans and Neanderthals is an established fact but newly sequenced Neanderthal Y-chromosomes tell scientists that modern humans are the product of a complex history of interspecies sex. Neanderthals had lived in Eurasia for more than 300,000 years, when our modern human ancestors left Africa in the most recent wave some 60,000–70,000 years ago. When […]