Kleitman often used himself as a subject in his sleep research, particularly on sleeplessness—whether in a pitch-black cave in Kentucky, in an underwater submarine during World War II, or on a trek ...

Researchers suggest that prehistoric cave dwellers created a model of the surrounding landscape, which might have been used for planning hunts. In the Ségognole 3 cave, located in the École ...

This is cave-dweller behavior, plain and simple. No class, no decency, just pure spite.” Added @QondiNtini, “We will stop talking about race when people stop doing things like this Deal?” ...

The genetic link between Homo sapiens and our closest extinct relatives, the Neanderthals and Denisovans, was unknown until it was established through Svante Pääbo’s epic work. Further to his ...