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.

（2025年1月8日，北京）全球最大的创业企业榜单编制机构胡润研究院今日于北京亦庄发布胡润未来独角兽系列——《2024胡润全球瞪羚企业榜》（Hurun Future Unicorns – Global Gazelles Index ...

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