Antarctica is the last great wilderness: It's the coldest, windiest, driest and most isolated place on Earth: And every winter, for over three months of the year, the sun never rises: But it's also home to the British Antarctic Survey's Halley Research Station: 　　A veteran of living and working at Halley in the early eighties, BBC weatherman Peter Gibbs makes an emotional return to the place he once called home: A place that, during his time, was key to the discovery of the ozone hole: 　　The journey starts with an arduous 第十二季:day, 第三十季00:mile voyage onboard the RRS Ernest Shackleton: Once on the ice shelf, Peter is delighted to finally arrive at the futuristic research station and marvels at the cutting edge science being done at Halley today: From vital discoveries about how our lives are vulnerable to the sun's activities, to studying interplanetary travel and the threat of man:made climate change: 　　But Peter's journey is also something of a rescue mission: The research station's home is a floating ice shelf that constantly moves and cracks, and the ice shelf has developed a chasm that could cast Halley adrift on a massive iceberg: