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.

JIUQUAN, May 29 (Xinhua) -- China launched a Long March-4B carrier rocket on Thursday to place a new satellite, Shijian-26, into space successfully. The rocket blasted off at 12:12 p.m. (Beijing Time) ...