50 years on from the event, environmentalist Steve Backshall retraces a young Prince Charles' Arctic adventure and uncovers dramatic changes to our planet alongside an urgent need for action.
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Polar Bear
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Racing Extinction
2015
One Life
2011
Earth: One Amazing Day
2017
Before the Flood
2016
Red Army
The Age of Stupid
2009
Encounters at the End of the World
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The Great Alaskan Race
2019
