在罗马帝国时期，帝国皇帝和教会之间的关系还停留在利用层面上，即帝国皇帝利用基督教会来巩固自身的统治。当西罗马帝国覆灭之后，这种关系也就随之终止了，基督教也因此摆脱了世俗君主的控制。但是这并不意味着教廷的势力从此超越了世俗国家，地位相对来说还是不及世俗 ...

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 ...