As the Lunar New Year unfolds into its third day, the air is still thick with the warmth of reunion and the joyous echoes of celebration. This poster is more than just an illustration of the third day ...

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.