A paramilitary is a semi-militarized force whose organizational structure, training, subculture, and (often) function are similar to those of a professional military, and which is not included as part of a state's formal armed forces.
Quora User, hobbyist filmmaker. The IMDB Filming Locations page for this movie contains the list of all filming locations: Interstellar (2014) The corn fields were created in the towns of Alberta. Yes, they actually planted 500 acres of corn so that they can destroy it in the film.
Interstellar was initially based on an 8-page description of ideas involving relativity, gravity, and time by physicist Kip Thorne and screenwriter Lynda Obst. (Kip Thorne and actress Jessica Chastain making the blackboard look realistic.)