In an isolated, mountainous area of New Guinea, scientists have re-discovered the Wondiwoi tree kangaroo, last documented in 1928. This medium-sized mammal is closely related to ground-dwelling kangaroos and wallabies, but it has strong forearms it uses to climb trees and move from branch to branch. In its remote, heavily wooded habitat, the animal is difficult to spot, often hiding high in the tree canopy. Explorers needed to cut a path into the dense bamboo forest and search for dung and scratch marks on tree trunks. They are now hoping to learn more about the rare mammal and do what they can to help it survive.