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。

Horizon is BBC Two's flagship 50-minute science documentary series. In September 2004 it celebrated its 40th anniversary and it continues to enjoy outstanding critical acclaim. Recognised as the world leader in its field, it regularly wins a sweep of international science, medical and environmental film accolades, and has recently won the Royal Television Society Award and the Prix Italia. In 2002, the British Academy of Film & Television Arts presented Horizon with the BAFTA Television Award for Best Factual Series or Strand. In 2003 it won the prestigious Images et Science award for best medical documentary and the Carl von Linne Award at the Living Europe film festival in Sweden. That year, a Horizon co-production with WGBH Boston won the Emmy for best documentary.

究竟是哪里疼呢？从出生那一刻到最后离开这个世界，我们总在经历着疼痛。我们毕生都在努力避免它，但是疼痛却是我们生存的关键因素。该片借助遗传学、最新的扫描技术、虚拟现实技术和催眠术，为我们解开一些疼痛背后的奥秘。让我们一起了解为什么有些人觉得比其他人更痛，而有些人却根本不知道疼痛为何物，本片带我们共同发现为什么情绪和想法可以影响我们对疼痛的感知。

Horizon follows the emotional journey of three young people with currently untreatable conditions to see if within their lifetime, they can be cured. 　　Sophie is desperate to discover if there's a medical breakthrough which will get her walking again - a car crash after celebrating her A level results left her paralysed from the waist down. Anthony's leg was amputated after a rugby accident on the eve of his eighteenth birthday. Will he ever be able to regrow his leg? Father of four Dean is desperate for a cure for his damaged heart to avoid an early death. They've all read the headlines about the astonishing potential of stem cells to heal the body. Now they've been given access to the pioneering scientists who could transform their lives. 　　With so much at stake, each meeting is highly emotional as our three young people find out if science can fix them.

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.

第1集 　　在本集节目中团队提出了一个最基本的问题，猫如何通过看听和嗅，来认识周围的世界。对于人类来说视觉是主要的感官，那么猫呢？ 　　第2集 　　本节目将揭示你所喜爱的宠物，如何转变成好斗的猎食者。我们的猫和它们的大型猫科远亲有着相同的捕猎天性，它们也表现出了巡逻和保护自己领地的需要。但大型猫科动物是野生动物而猫找到了成为宠物的方法，那么它们是如何适应和发展出与人类共处的能力的呢。宠物猫似乎并不怕害我们，一些猫甚至积极地寻求我们的陪伴。 　　第3集 　　世界顶级的猫类科学家将进行一项史无前例的科学研究，来发现我们猫类朋友的秘密生活，向你展示不可思议的猫语，它们会发出颤音，会发出咘咘的有趣叫声。实验将向你展示猫如何让彼此知道它们是朋友亦或敌人，我们睡觉时它们有着不可思议的对话，以及它们为何如此让人喜爱。本期节目将向你揭示猫类的秘密语言以及它们对你的倾诉。

Horizon: The Truth About Looking Young Plastic surgeon Dr Rozina Ali leaves the operating theatre behind for the frontiers of skin science and asks if it is possible to make your skin look younger without surgery. She discovers the latest research about how the foods we eat can protect our skin from damage, and how a chemical found in a squid's eye is at the forefront of a new sun protection cream. She also finds out how sugar in our blood can make us look older, and explores an exciting new science called glycobiology, which promises a breakthrough in making us look younger.

本部纪录片是BBC地平线系列推出的一档探讨“过敏症”为命题的纪录片。五十年前，过敏症几乎不存在，然而目前却影响着三分之一的成年人和将近四成的儿童，席卷了整个西方世界。这种表现形式各异的疾病，能让你鼻子发痒、打喷嚏，甚至完全阻塞你的呼吸。为了寻找解决良方，本部纪录片将带领你踏上一次揭秘之旅，从最偏远的岛屿到被污染的中心加利福尼亚和英国，一路走访患病者和科学专家，发掘这个现代医学中最大的奥秘——为何我们会身处如此一个过敏的世界。 　　地平线系列纪录片是英国广播公司BBC制作的一档流行并且播放已久的科学纪录片，于1964年5月2日首播，到2013年为止已有49个系列超过1100集。本系列纪录片从历史、人文、宗教、地理、设计、艺术、生物、哲学、环保、伦理等多个方面，提供世界上最伟大科学家和哲学家一个可以交流他们看法和观点的平台，并将他们对世界的新看法引入到我们的日常知识中来的科教节目。

本部纪录片是BBC地平线系列节目四十年来颇具争议的一次感官剥夺实验。此次实验由圣乔治医院精神创伤心理科的领头人伊恩·罗宾斯教授发起，他从世界各地邀请六位曾在英国关塔那摩被拘留和受过酷刑的人，研究他们大脑所经历的变异。这六位志愿者被置身于一个核燃料仓中，其中三人被安排独自待在黑暗的隔音房中，而其他三人则戴上护目镜和泡沫箍袖带，被安排在刺耳的白噪音中。等待他们的是足足48小时的漫长煎熬。 　　最初的实验是由顶级心理学家唐纳德·赫布教授于二十世纪六十年代进行的，但很多北美政治和科学团体认为该实验极其残忍，被迫中止。

欢迎来到我们的拥挤世界 世界人口在不断增长，在接下来的四十年里，可能会超过九十亿。在这个精彩的节目中，著名自然学家和主持人大卫•艾登堡爵士将研究我们作为一个连续发展物种所面临的这个问题。从墨西哥到西班牙，中国到卢旺达，他采访了生态学家、人口统计学家、农民、工程师和从事计划生育的医生。他们为我们讲述应对人口增长要面临的巨大挑战。世界上每天有四十万人出生，大卫•艾登堡对此问道：地球上最多能生活多少人？人口控制是否应该成为我们每个人的义务？