“建议十二生肖把蛇开除。” 你可能也看到近来网上有人这样戏言，因为“满大街的丑蛇装饰让怕蛇人默默碎了”。还有人建议干脆生肖改名，比如改成猫年，那猫就可爱多了（附带说一句，越南十二生肖还真有猫，但猫取代的不是蛇，而是兔）。 不可否认，在十二生 ...

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 world slept only 6.5 hours a night.