The Inca Empire ruled millions without a written language — at least not in the sense that we typically think of one, such as ...

Inca society kept records by encoding information into knotted cords called khipu. A new analysis of hair woven into these cords suggests this record-keeping was practiced by commoners as well as ...

COPENHAGEN, Denmark — Outside Denmark’s Louisiana Museum of Modern Art on a recent late-summer morning, a few sunstruck visitors were sprawling on the turf of the sculpture garden, between ...

Analysis of the hair used in a knotted device reveals the owner’s simple diet. That suggests commoners, not just the elite, kept records in Inca society.