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.

齐鲁网 ·闪电新闻1月24日讯 The originally normal dough magically turns into various unimaginable shapes. Delicate and charming flowers, ...

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