NOVAStagione 4 Aggiungi immagineNumero di episodio14The Red PlanetOverviewNOVA traces 300 years of speculation, investigation and discovery that have centered on Mars—particularly the theory that the planet could support life. Questions raised by NASA's 1976 Viking mariner missions about how the vast canyons were formed are also explored.Air dateApril 27, 1977Runtime (min)60