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.

你好呀，我是良哥。今天的好文来啦，请阁下细细品尝。我们生活在这个世界，心里的不安时不时会找上门来，每个人都希望能一个人待着清净清净，但心理疾病依然会反复出现在我们的人生中。时刻为心理疾病的发作做好准备，能够帮助我们有效调整，并让我们更加耐心，不那么恐 ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...