After winning a comics contest, Marcos Calo started out publishing in the review BD-Banda and in volumes 6 and 7 of the French anthology 'Drôles d'Histoires' (scripts by Jacky Goupil, Vents d'Ouest). He has contributed to the protest comic H2OIL of the Chapapote collective and he has worked on animation productions like 'El Bosque Animado', 'Goomer' and 'A Midsummer Night's Dream'.