Algerian Jewish Sign Language evolved over centuries in isolation, within a walled city of the Sahara, before turning up in Israel.

Thousands of years ago, artists documented their world on rock walls—including, perhaps, ritual use of hallucinogens.

For more than a millennium, Tipasa was a symbol of cross-cultural exchange. Now the sea is coming for it.

Public health officials hope the success can be replicated.

The long, dark, painful history of an everyday emotion.