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.

Scientists researching Alpine glaciers store ice in Antarctica. By analysing air bubbles in the ice they may be able to predict the future ...

春节假期，亲朋好友团聚，享受美食，当然也少不了好剧相伴。想找一部适合假期沉浸其中的美剧？别担心，无论你是想要轻松一笑，还是期待紧张刺激，以下十部经典美剧，总有一款适合你。 1. 《老友记》（Friends）—— ...