环境部周二首次向多伦多发出极寒警告，称寒风下，体感温度范围在-30℃到-35℃之间。警告指出，一股北极冷气团为该地区带来了刺骨的寒风，“极寒 天气 将在周三上午结束。” ...

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.

The Sackler family in the United States and their pharmaceutical company Perdue have reached a 7.4 billion dollar settlement ...