Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

which expands the degree of artistic development found in South America at this time,” they write. Scientists hope the new technique could lead to improved analysis of tattoos on mummies from ...

including South America. The first of these, which came in eighth place, was Choquequirao, an ancient Incan city perched high above Peru’s Apurímac River. It’s known as Machu Picchu’s ...