Summary In April 1992, Mexican photographer Óscar Arredondo Ramírez presented a series of photographs that allegedly showed an extraterrestrial inside the volcanic crater of La Alberca, near Valle de Santiago, Guanajuato. The figure became known as the “Humanoid of Valle de Santiago” or “El marcianito de La Alberca.” Arredondo ran a photography business called Fotografía México on Calle Juárez in Valle de Santiago. His photographs first appeared in ¡Cuestión Policiaca! No. 104, dated October...