Learn about nocturnal behavior in this clip from Gorongosa Park: Rebirth of Paradise. Piotr Naskrecki has brought together a team of top scientists to explore Gorongosa's limestone gorges. Abseiling down they discover pristine forests and caves packed with new life. The team finds a cave where one animal's dung keeps the cave's ecosystem alive. The scientist have to become nocturnal to get a glimpse into this world.