What Do We Know About Atlantis? lets curious young readers dive into what we really know about the sunken city. First described by Plato, the idea of Atlantis has existed since 360 B.C.! Learn about the history of the Greek god Poseidon's relationship with the kingdom and the real research that's been done by historians and scientists who are trying to locate Atlantis. Featured in plenty of movies, books, and comics, Atlantis is still relevent in popular culture today...but does it really exist? Find out all the facts we do know about it in this exciting book. Series Overview: Following the same format as the #1 New York Times Best-Selling Who Was? series, the What Do We Know About? books explore the histories of famous cryptids, mysteries, and phenomenons.