（华盛顿2日讯）美国费城星期五（1月31日）晚间有一架小型医疗飞机起飞不久后即失事，坠毁在费城一处闹区，地面上留下宛如空袭后巨大弹坑的痕迹。机上6人全部罹难，地面上也有多人伤亡。当局星期六（2月1日）宣布又增加一名死者，是一名在汽车内的人员。

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.

Shanghai is set to face wet and cold weather over the next five days of the Spring Festival holiday, which will run through next Tuesday. Due to the influence of warm and wet air currents, scattered ...