DNA research reveals that humans, Neanderthals, and Denisovans interbred thousands of years ago—creating a complex “braided stream” of human evolution still visible in our genes today.
Deep in the Amazon rainforest there lives a tribe most people have never seen. They’re called the Massaco, and until very recently, not a single outsider had laid eyes on them.
For years, archaeologists have wondered why sections of fingers are missing from prehistoric painted hand stencils in European caves. A new theory offers one disturbing explanation.