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.
This is Xiangtan, an open and inclusive city and the hometown of the great leader Mao Zedong. This is Xiangtan Comprehensive Bonded Zone, serving as a bridge connecting Xiangtan to the world.
Chinese researchers have surveyed snow leopard populations across an area of approximately 360,000 square km on the Qinghai-Xizang Plateau, estimating a population size of 1,002 of the rare species in ...