Over the past half decade, ancient DNA research has revealed that ancestors of living people across the planet interbred with other closely related species of human But where in the world did these cross-species matings occur? And which archaic species were involved?
Ancient river network discovered buried under Saharan sand
“People sometimes can’t get their head around climate change and how quickly it happens. Here’s an example where within just a couple of thousand years, the Sahara went from being wet and humid, with lots of sediment being transported into the canyon, to something that’s arid and dry,” Wynn said.