Imagine a world where sea levels have risen by 20 feet. Cities flood and coastal regions disappear. Travel to Greenland where scientists are investigating if this nightmare could become a reality .

We spend more on chocolate each year than investors spend on gold - but as Easter approaches, how much do we really know about where it comes from or how it is made? Panorama reporter Paul Kenyon goes undercover as a cocoa trader in West Africa and discovers children as young as seven working long hours on cocoa farms, helping to make the chocolate we love so much. He buys a to...

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。

Just months ago, the world stood in fear of an emerging new disease that threatened to kill millions. A new flu variant H1N1 had arrived. In the UK alone, 65,000 deaths were predicted. Yet to date, these dire warnings have not materialised. 　　If this latest pandemic has taught anything, it is just how little is understood about the invisible world of viruses. But that has not sto...

长达88分钟的迈克尔·杰克逊（Michael Jackson）纪录片

David Suzuki holds twenty-four honorary degrees from academic institutions around the world and has written forty-eight books. A household name synonymous with nature and science, he was voted one of the top ten greatest Canadians of all time in 2004, ranking ahead of Wayne Gretzky and Sir John A. Macdonald. He is best known as the host of the long-running CBC TV show The Natur...