4:22 video Madagascar's top predator is a mysterious cat-like creature called the fossa. But dogs and humans are threatening its very existence. National Geographic's Luke Dollar investigates.
3:14 video November 7, 2011 - Watch as biologist Luke Dollar uses a blowgun to subdue and study Madagascar's top predator, the fossa. The catlike creature "will eat pretty much everything in the forest," but to survive, it'll still need help from conservationists like Dollar, a National Geographic Emerging Explorer.