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This high frontier is one of the least known and least seen habitats on earth, but it has the greatest concentration of life on the planet. In the jungles of Borneo where the trees are tallest, Charlotte's quest is to find out what it's like to live 200 feet above the ground in a complex three dimensional world where one slip could be fatal!

For us humans used to walking on solid ground, it's an incredibly difficult place to explore. But using all kinds of modern technology, Charlotte climbs up into this remarkable but precarious world to reveal why it's such a special place. Using ropes, platforms, balloons, cranes, gondolas, inflatable rafts and raw climbing skills she searches for spectacular concentrations of wildlife and finds out why the jungle canopy is the most diverse part of the most varied ecosystem on earth.