The Lost World is a 1925 American silent fantasy giant monster adventure film adapted from Arthur Conan Doyle's 1912 novel of the same name. The film was produced and distributed by First National Pictures, a major Hollywood studio at the time, and stars Wallace Beery as Professor Challenger. It was directed by Harry O. Hoyt and featured pioneering stop motion special effects by Willis O'Brien, a forerunner of his work on the original King Kong. Doyle appears in a frontispiece to the film, absent from some extant prints. In 1998, The Lost World was deemed "culturally, historically or aesthetically significant" by the Library of Congress and selected for preservation in the United States National Film Registry. Because of its age the film has come into the public domain, so that anyone may freely copy it for a commercial purpose. Plot From a lost expedition to a plateau in the borders of Peru, Brazil and Colombia, Paula White brings the journal of her father, explorer Maple White, to the eccentric Professor Challenger in London. The journal features sketches of dinosaurs which is enough proof for Challenger to publicly announce that dinosaurs still walk the earth. Met with ridicule at an academic meeting at the Zoological Hall, Challenger reluctantly accepts a newspaper's offer to finance a mission to rescue Maple White. Professor Challenger, Paula White, sportsman Sir John Roxton, news reporter Edward Malone (who is a friend of Roxton and wishes to go on the expedition to impress his fiancée), a skeptical professor Summerlee, an Indian servant Zambo, and Challenger's butler Austin leave for the plateau. At their campsite at the base of the plateau, the explorers are shocked when a large rock falls, sent their way by an Apeman perched on top of an overhead ledge. As the crew look up to see their attacker, Challenger spies overhead a Pteranodon (mistakenly calling it a Pterodactyl) eating a young Toxodon alive which proves that the statements in Maple White's diary are true. Leaving Zambo and Austin at the camp, they cross a chasm onto the plateau by cutting down a tree and using it as a bridge, but it is knocked over by a Brontosaurus, leaving them trapped. The explorers witness various life-and-death struggles between the prehistoric beasts of the plateau. An Allosaurus attacks a Trachodon, and knocks it into a bog. The Allosaurus then attacks, and is driven off by a