sentences:  A race of prehistoric men who have been frozen for thousands of years at the North Pole make their only appearance.They are apparently strong enough to survive a bazooka shell, super-intelligent, and explorer Rodney Stark has devised a method of bringing them back to life, planning to use them to build an air force, using copies of stolen U.S planes, allowing him to take over the world.They are all destroyed in an explosion along with Stark when Captain Marvel makes their planes crash.