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.

（曼彻斯特综合电）欧洲各大足球联赛的冬季转会窗口在当地时间星期一（2月3日）关闭，英超四连冠得主曼市（Manchester City）在截止日以6000万欧元（约8415万新元）从葡萄牙的波尔图（Porto）引进西班牙中场尼科·冈萨雷斯（Nico ...