The Mars monolith is a rectangular object (possibly a boulder) discovered on the surface of Mars. It is located near the bottom of a cliff, from which it likely fell. The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away.
- Natalie Wolchover - Mars 'monolith' isn't the work of Martians (2012) - NBC News
- Alexandra Ludka - NASA Reevaluates Mars Program After Budget Cuts (2012) - ABC News
- Barras, Colin. "There is a huge 'monolith' on Phobos, one of Mars's moons" (in en). http://www.bbc.com/earth/story/20160923-there-is-a-huge-monolith-on-phobos-one-of-marss-moons.
- Boulders and Layers in Canyon - NASA
- HRSC - ESA (overview of HiRISE image region by Mars Express)
- HiRISE image of area
Original source: https://en.wikipedia.org/wiki/ Mars monolith. Read more