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。

To Infinity and Beyond Series exploring topical scientific issues. By our third year, most of us will have learned to count. Once we know how, it seems as if there would be nothing to stop us counting forever. But, while infinity might seem like an perfectly innocent idea, keep counting and you enter a paradoxical world where nothing is as it seems. Mathematicians have discovered there are infinitely many infinities, each one infinitely bigger than the last. And if the universe goes on forever, the consequences are even more bizarre. In an infinite universe, there are infinitely many copies of the Earth and infinitely many copies of you. Older than time, bigger than the universe and stranger than fiction. This is the story of infinity.

Something weird seems to be happening to our weather - it appears to be getting more extreme. In the past few years we have shivered through two record-breaking cold winters and parts of the country have experienced intense droughts and torrential floods. It is a pattern that appears to be playing out across the globe. Hurricane chasers are recording bigger storms and in Texas, record-breaking rain has been followed by record-breaking drought. Horizon follows the scientists who are trying to understand what's been happening to our weather and investigates if these extremes are a taste of what is to come.

你是否正在超市为挑选完美的“超级产品”而忙于购物？那些包装上极具诱惑力的宣传暗示，正怂恿着我们去购买他们的产品。然而这些超市产品真的就如此“超级”么？本次探秘之旅将由莱斯利·里根教授带领你一起抽丝剥茧，去验证这些宣传噱头背后的科学真实性。里根教授一直致力于食品安全的研究，有机食品就更健康么？超市产品包装上的功效就准确无误么？……里根教授正试图结束这场争论，她将用科学依据为衡量准则，一探究竟。 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。

NASA的“好奇”号火星探测车于2012年8月在火星表面着陆，将回答关于火星的大问题 – 火星适合人类居住吗？“好奇”号是一个装有多种科学设备的移动实验室，是最大、最强有力的火星探测器，它透露出的信息可能永久改变我们对标志性红色星球的看法。但在“好奇”号能够开始它的发现使命之前，它首先必须通过最大的考验 – 安全降落在火星表面。到2010年时，造访火星的尝试已进行了38次，但只有19次取得成功。《地平线》将讲述这一独特科学发现之旅的故事。

Alice Roberts explores the latest discoveries in the study of human origins, revealing the transformation that has been brought about in this field by genetics. Traditional paleo-anthropology, based on fossils, is being transformed by advanced genome sequencing techniques. We now know that there were at least four other distinct species of human on the planet at the same time as us - some of them identified from astonishingly well-preserved DNA extracted from 50,000-year-old bones, others hinted at by archaic sections of DNA hidden in our modern genome. What's more, we now know that our ancestors met and interacted with these other humans, in ways that still have ramifications today. Alice uses these revelations to update our picture of the human family tree.

The acerbically witty and severely facially disfigured broadcaster Adam Pearson presents a personal film about genetics. He and his twin brother Neil are genetically identical and both share the same genetic disease, Neurofibromatosis 1 (Nf1) - yet they are completely different. Adam's face is covered with growths, whereas Neil has none. Neil has short-term memory loss, whereas Adam is razor sharp. How can the same genetic disease affect identical twins so differently? Adam is on the cusp of a successful film and television career, but the disease has left tumours on his face that are growing out of control and he could lose his sight. For years, everyone thought Adam's brother Neil had escaped symptoms, but today his life is governed by epilepsy and a mysterious memory loss that suddenly came on during his teens. Determined to save their future, Adam tries to find out why the disease affects the twins so differently and see if there is anything he can do to stop it from tearing their lives apart.

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。

黑洞是宇宙中最具破坏性的力量之一，能够撕裂行星并吞噬整个恒星。 如今，科学家相信可以通过黑洞解答宇宙的终极问题：大爆炸之前有什么？

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.