Professor Challenger leads an expedition of scientists and adventurers to a remote plateau deep in the Amazonian jungle to verify his claim that dinosaurs still live there. Professor Challenger leads an expedition of scientists and adventurers to a remote plateau deep in the Amazonian jungle to verify his claim that dinosaurs still live there. Professor Challenger leads an expedition of scientists and adventurers to a remote plateau deep in the Amazonian jungle to verify his claim that dinosaurs still live there. Professor Challenger leads an expedition of scientists and adventurers to a remote plateau deep in the Amazonian jungle to verify his claim that dinosaurs still live there.