Red Martians, also known as Martians, are fictional inhabitants of the planet Mars in various science fiction works. They are often depicted as humanoid beings with red skin, reflecting the planet's reddish appearance due to iron oxide. These characters frequently embody traits such as advanced technology and complex societies. In literature, the most famous portrayal of Red Martians comes from Edgar Rice Burroughs's series, starting with "A Princess of Mars." In this series, they are shown as a warrior race with a rich culture and a hierarchical society, often engaging in conflicts with other Martian species and Earthlings.