SE Asia | Equator from the Air
Gordon Buchanan discovers how eyes in the sky are helping protect endangered orangutans, elephants and people in south east Asia, where booming economies are taking a toll on the natural world.
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1: Arctic Part 1 | Undiscovered Worlds with Steve Backshall
Steve Backshall visits unexplored parts of the world. This time his team is kayaking in the Arctic - they face perilous sea ice and have a terrifying encounter with a polar bear.
2: Arctic Part 2 | Undiscovered Worlds with Steve Backshall
Naturalist and explorer Steve Backshall leads a team on a mission to summit a remote and unclimbed mountain deep in Greenland's Arctic wilderness.