The Mars monolith is a rectangular object (possibly a boulder) discovered on the surface of Mars. [1] [2] The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away. [1] The HiRISE camera that was used to photograph the monolith has a resolution of approximately 1 foot or 30 centimeters per pixel. [3]
Around the same time, the Phobos monolith made international news. [4]