We all have a biological clock ticking away inside us that governs our daily rhythms. This affects our health as much as our diet and whether we exercise. So what can we do to manage this internal clock better? 　　To find out, evolutionary biologist Ella Al-Shamahi locks former commando Aldo Kane in an abandoned nuclear bunker with no way of telling the time - for ten days. Monitored around the clock by a team of scientists, he carries out a barrage of tests to uncover exactly what makes our body clock tick. 　　Above ground, Ella meets two time-starved couples to test the latest thinking on how we can manage our body clocks better. In trying to improve their sleep, and their lives, she uncovers practical advice that we can all take on board. Studies on shift workers show that regularly disrupting our sleep makes us more at risk of diabetes, heart disease and even cancer. So getting to grips with our biological clock couldn't be more important.

为什么在八点钟在早上你更可能有心脏病，或下午两点钟在高速公路上撞坏你的车？在正确的时间吃药真的挽救你的生命？你是不是曾经想知道为什么青少年在上午很不想起床？ 　　这些问题的答案在生物钟的秘密。

Set against the back drop of awe inspiring geological beauty, a strange scientific adventure sets out to discover how a mineral clad cave network - the height of a 30 storey building and the length of six football fields - came to exist deep below the Guadalupe Mountains in North America. 　　But this journey soon unravels a multitude of inexplicable phenomena and obscure geological formations, leading to the discovery of extreme rock-eating microbes - a testimony from primordial Earth and a glimpse of life elsewhere in the Solar System.

本部纪录片是BBC地平线系列推出的一档探寻“土星的秘密”为命题的纪录片。土星，这颗人类用肉眼能够看到的最远行星，以其神秘美丽的土星环而被赋予诸多神话色彩。为了能够近距离地研究土星，美国国家航空航天局于1997年10月15日发射了“卡西尼-惠根斯”探测器。这将是关于航天史上最为野心勃勃的一次无人驾驶航天飞船项目，土星之谜即将被揭开。 　　土星拥有为数众多的卫星，而最著名的“土卫六”上有大气一说，更是最受天文学家瞩目的课题，也是本部纪录片的高潮所在。千百年来，人类都在试图揭开生命起源之谜。那么我们就跟随地平线摄制组的脚步，一起踏上这个跨越太阳系的伟大征程。通过探测这个未知的外星世界，来解答生命是如何开始的提问。

讲述了一位女性在朋友、家人和社会迫使她生孩子后，报名参加了一项临床试验，去试图修复她那看似破碎的生物钟的故事。

讲述了一位女性在朋友、家人和社会迫使她生孩子后，报名参加了一项临床试验，去试图修复她那看似破碎的生物钟的故事。

Corby镇出现多名天生四肢畸形缺陷的新生儿，调查发现可能与当地污染废料有关。

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？

Horizon plunges down the biggest rabbit-hole in history in search of the smallest thing in the Universe. 　　It is a journey where things don't just become smaller but also a whole lot weirder. Scientists hope to catch a glimpse of miniature black holes, multiple dimensions and even parallel Universes. As they start to explore this wonderland, where nothing is quite what it seems, they may have to rewrite the fundamental laws of time and space.