Just how large are male orangutan territories? Even after years of studies at Gunung Palung National Park in Borneo, we don't know. When males enter wild rainforest away from research trails, studies are abandoned due to the difficulties of straying so far from camp.

To solve this mystery, we will take a new approach: by equipping ourselves with enough gear to survive longer term periods in wild rainforest, we can finally track these males to their limit, and map their full territories via GPS.