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.

ABBA乐队作为流行音乐史上的传奇一直为人所铭记，ABBA的歌曲旋律让人回味无穷，ABBA乐队曾经卖出的唱片超过3.5亿张，麦当娜举办的演唱会中《舞蹈皇后》是必演的曲目，西域男孩翻唱的《我有一个梦想》火遍世界各地，高凌风、费翔等实力派中国歌手都翻唱过 ...