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 ...

时隔五年，我再次踏上澳大利亚昆士兰的土地，这已经是我第三次来这里旅行。每一次，昆士兰都像是一位神秘的老友，总能带来不一样的惊喜。 五年时光，这片土地满是新变化。漫步在没去过的街道，海风熟悉又陌生，处处都是未知的期待。