Few puzzles in the history of human civilization are as captivating — or as fiercely debated — as the astronomical knowledge attributed to the Dogon people of Mali, West Africa. For centuries, this ...

Oakhurst rock shelter is an archaeological site near the town of George on the southern coast of South Africa. It is set into a sandstone cliff above a stream in a valley forested by towering old ...

When I tell people that I research cannabis, I sometimes receive a furtive gesture that implies and presumes: “We’re both stoners!”, as if two members of a secret society have met. Other times, I ...