I’m a planetary scientist who was born the year of Sputnik’s launch. Over the course of my 40-year career, I’ve witnessed not one but at least five separate revolutions that fundamentally transformed ...

A trio of jawbones, a leg bone, and a handful of vertebrae and teeth found in Morocco may represent one of the last common ancestors of Neandertals, Denisovans and modern humans. “We can say that the ...