南极洲的冰盖数百万年来一直在塑造着海洋，但最近的发现表明，冰山甚至在该大陆大冰冻之前就已经存在。冰山脱离南极洲漂洋过海的情况并不罕见--就像目前正向南乔治亚岛移动的巨大冰层一样。

其中最让英国人自豪的海外殖民地，是不被国际所承认的“英属南极领地”。这块领地面积达170.94万平方公里，相当于大约7个英国的本土面积。当然英国如此在意这个属地的原因可不仅仅是因为它长得胖，其根本原因是因为这块领地包括的岛屿众多，比如帕玛半岛、龙尼冰 ...

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.

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.