简介：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？

简介：In the aftermath of the 2016 Kashmir unrest, a young local field agent, Zooni Haksar, is picked out by Rajeshwari Swaminathan from the Prime Minister&

简介：作为全世界分布最广、最成功的蝴蝶之一，小红蛱蝶每年都会进行大陆间的漫长迁徙之旅。在非洲摩洛哥的3月末，小红蛱蝶在这里完成繁衍后向北迁徙，顶着恶劣天气穿过地中海，在5月经过法国，然后在6月初7月末抵达英国，一些蝴蝶甚至会趁着天气仍然温暖时继续向北部进发。一路上，一些蝴蝶因为各种原因会选择不再继续前进，

简介：宇宙中四分之一的物质仍处于未知的状态。我们知道它们对天空的影响，但是从未亲眼目睹，也无从解释。这种神秘的东西叫做暗物质。科学家们希望他们能确定暗物质的成分，并借此找到宇宙谜团中的关键物质，同时能够解开粒子物理学中标准模型的一些问题。从瑞士的欧洲核研究组织到智利的望远镜，《地平线》见到了一些科学家，他

简介：Carol Jeffries (known as 'Jeff') is a naive American woman staying in the Phillipines. She is given ten years in prison after being set up by

简介：The attempt to send and land astronauts on Mars risks billions of dollars and the lives of those brave enough to attempt it. Is the possible benefit r

简介：　　A black market marijuana dealer tries to make one final score before getting squeezed out of the business when cannabis becomes legal.

简介：They are the miracle pills that shouldn't really work at all. Placebos come in all shapes and sizes, but they contain no active ingredient. Now th

简介：On a bright, cold morning on 15th February 2013, a meteorite ripped across the skies above the Ural mountains in Russia, distintegrating into three pi

简介：Taste is our most indulgent sense but it is only in recent years that we have started to understand why we really love the foods we do - and it is a l