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.

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.

The year 2024 passed by in the blink of an eye. Over the past year, Hangzhou achieved significant breakthroughs in ...