In the 1920s, 1930s, and 1940s, a type of magazine aimed at a young readership and printed on cheap, pulpy paper. The stories - mostly science fiction, horror, crime, and exotic (and sometimes spicy) adventure - were frequently lurid and over-the-top, but they also produced some classic fiction. Many of the great science fiction writers of the 20th century got their start in the pulps; pulp adventure heroes that have survived into the present day include The Shadow, Doc Savage, Zorro and Tarzan.