Lost World (ロスト・ワールド<前世紀>, Lost World - Zenseiki) is a manga series, written and illustrated by Osamu Tezuka in 1948. It is the first work in what is regarded as Osamu Tezuka's early science fiction trilogy, consisting of Lost World (1948), Metropolis (1949) and Nextworld (1951). Though they are separate, self-contained stories, they are often collected together in reprints. Source: Wikipedia (en)