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？

历代科学家都在被“宇宙中的万物到底从何而来”和“宇宙是如何诞生的”的这两大难题所困扰。近一百年，我们似乎找到了答案：宇宙是在过去有限的时间之前，由一个密度极大且温度极高的太初状态演变而来的，并经过不断的膨胀与繁衍到达今天的状态。由此宇宙大爆炸一说，得到了当今科学研究和观测最广泛且最精确的支持。 　　然而这一等同于科学事实的理论，却遭到一些科学家的质疑。他们相信大爆炸并不是宇宙真正的开始，我们的宇宙在此之前就可能有过生命迹象。这个可能会严重影响、甚至颠覆当今宇宙学支柱的理论，到底成立与否？就让我们共赴此次未知的极限之旅，去探索这个令人眼花缭乱的深奥谜团——宇宙大爆炸之前，到底发生了什么。

Most of us think that Obsessive Compulsive Disorder (OCD) is just over fussy tidying. But it's actually much more serious. Sophie has to check that she hasn't killed people, looking for dead bodies wherever she goes, Richard is terrified of touching the bin, and Nanda is about to have pioneering brain surgery to stop her worrying about components on her body - that her eyebrow ...

The car has shrunk the world, increased personal freedom and in so many ways expanded our horizons, but there is a flipside. Fumes from car exhausts have helped to destroy our environment, poisoned the air we breathe and killed us in far more straightforward ways. But all that is going to change. 　　This episode enters a world where cars can drive themselves, a world where we are ...

https://www.bbc.co.uk/iplayer/episode/b0bb33ht/horizon-2018-3-how-to-build-a-time-machine　　Time travel is not forbidden by the laws of nature, but to build a time machine, we would need to understand more about those laws and how to subvert them than we do now. And every day, science does learn more. In this film Horizon meets the scientists working on the cutting edge of discov...

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，他们试图解决宇宙中最大的谜题，并提出问题，研究的成败对物理学的未来意味着什么。