Self-taught artist Francisco Darnis was one of La Risa Infantil magazine's main artists. His first appearance was in issue 540 and with his series he would make science-fiction and space opera's popular in Spain. He began his career as a cabinetmaker and pianotuner, in succession of his father. He took on drawing when he was inactive for two months due to an accident in 1930. Inspired at first mainly by Alex Raymond, he produced such famous stories for La Risa Infantil as 'Tom el Dominador del Universo', and 'Sam el Gigante en la Terrible Isla de los Hombres Caimanes'. His longest running, and most famous series became 'Nick, Pecho de Hiero', which he created in 1933. His work was also published in magazines like P.B.T. and Rin Tin Tin. He created the adventure strip 'El Jabato' along with scriptwriter Victor Mora in 1958. Darnis drew the series until his death in 1966.