Take a good look at the piece of cloth pictured at the top of this story. That was made 6,000 years ago by people living on the coast of Peru. Now check out those faint blue lines running through it. Yes, they're washed out, but you can still see them ...

A George Washington University researcher has identified a 6,200-year-old indigo-blue fabric from Huaca, Peru, making it one of the oldest-known cotton textiles in the world and the oldest known textile decorated with indigo blue. Credit: Lauren Urana.

This ancient scrap of fabric, decorated with indigo blue stripes, was found embedded in a concrete-like material that made up Peru's Huaca Prieta temple. Credit: Photo courtesy of Lauren A. Badams. The oldest indigo-dyed fabric ever found has been ...

Archaeological research has identified the use of cultivated cotton (Gossypium barbadense) in the ancient Andes dating back to at least 7800 years ago. Because of unusual circumstances of preservation, 6000-year-old cotton fabrics from the Preceramic ...