Mars monolith
Rectangular boulder discovered on the surface of Mars
From Wikipedia, the free encyclopedia
The Mars monolith is a rectangular object, probably 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.[1]

Around the same time, the Phobos monolith made international news.[3]
See also
- List of rocks on Mars
- Mineralogy of Mars
- Phobos monolith, boulder on Martian moon