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

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.

近日，美国政坛迎来新变动，据美联社报道，克里斯蒂.诺姆（Kristi Noem）在 1 月 25 日经美国参议院投票确认，成为唐纳德.特朗普总统的国土安全部长，并于当日晚宣誓就职。