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.
在全家一起守岁,迎接新一年到来的时候,细心的朋友发现:今年的除夕居然不是年三十而是年二十九!更奇特的是,这个乙巳蛇年出现了两个立春,分别在正月初六和腊月十七,是个双春年,这是怎么回事?
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
地球是一个奇迹科技|全球将国家地理中文网设为星标方能收到正常推送这根胡萝卜是人体重要的营养来源。但越来越多的证据表明,如今种植的许多水果、蔬菜和谷物所含的营养成分在减少,这意味着 ...