Most of us think that Obsessive Compulsive Disorder (OCD) is just over fussy tidying. But it's a

人为什么会笑？笑的本质是什么？笑声在社交中有什么作用？大脑能分辨真笑和假笑吗？存在全世界通行的喜剧吗？

The car has shrunk the world, increased personal freedom and in so many ways expanded our horizons,