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 ...

As we move past the super electoral year of 2024, all eyes are now on 2025. With the return of “Trump 2.0,” what impact will ...

现在我们周围的环境污染越来越严重。作为一个中学生，我们应节约资源，保护环境，从我们身边的小事做起，做一个“低碳生活”的中学生。请以“My Low--carbon Life”为题，写一篇短文描述自己的“低碳生活”。

"How can the stream be so clear? - It is because of the fresh water from its source (问渠那得清如许，为有源头活水来)." The documentary about ...