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The Mars monolith as seen from orbit

The Mars monolith is a rectangular object (possibly a boulder) discovered on the surface of Mars.[1] It is located near the bottom of a cliff, from which it likely fell.[1][2] The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away.[1] It is estimated to measure about 5 meters wide.[3]

Around the same time, the Phobos monolith made international news.[4]

See alsoEdit


  1. ^ a b c Natalie Wolchover - Mars 'monolith' isn't the work of Martians (2012) - MSNBC
  2. ^ Alexandra Ludka - NASA Reevaluates Mars Program After Budget Cuts (2012) - ABC News
  3. ^ "Has the mystery of the Mars 'Monolith' been solved?". Daily Mail. UK. 6 August 2009. Retrieved 2016-09-25.
  4. ^ Barras, Colin. "There is a huge 'monolith' on Phobos, one of Mars's moons". Retrieved 2018-01-24.

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