Rare Documentary: Cydonia The Mars Connection (1995)

In 1976 and after almost a year of travel, space probe Viking I arrived at Mars, taking several photos to send them to planet Earth. In the Mars zone called Cydonia scientists and NASA staff found in the photos a possible and giant face looking to the martian sky and a pyramid a few times bigger than Gizeh's Pyramids. The match of the Face or Mars with the Sphynx of Egypt disturbed scientists, experts and common people around the world. Are these photos the definitive evidence of a martian civilization disappeared millennium ago, or just was it a game of lights and shadows, creating something that really doesn't exist?