Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

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.

Capybaras in red bow tie are pictured in Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region, ...