Audio slideshow: Human Planet
From the icy Arctic to Africa's dense jungles - and the mountain tops of Mongolia to the deep waters of the Pacific - the 成人论坛 series Human Planet has explored mankind's incredible relationship with nature.
Accompanying the film crews was photographer Timothy Allen. His stunning still images captured unique glimpses of people living in the world's most extreme environments. Take a look at some of them, and listen to him explain how he snapped the most arresting shots.
Continue reading the main storyHuman Planet will be broadcast on Thursday 3 March at 2000 GMT on 成人论坛 One. It will also be available on the 成人论坛 iPlayer.
You can also talk to the programme's producers in a live webchat - Ask Human Planet - at 2100 GMT on Thursday 3 March.
Click 'show captions' for image information. Photography by Timothy Allen and all images subject to copyright.
Music courtesy KPM Music. Slideshow production by Paul Kerley. Publication date 3 March 2011.
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