"Alien hunters" on Earth poring over photos of the Martian surface have announced the discovery of what appears to be another crashed UFO or alien spaceship on the surface of Mars.

Another group announced an earlier discovery in February of a gigantic UFO half-buried beneath the Martian soil. The UFOs found in both cases had the shape of a flying saucer, the traditional image of UFOs to Earthlings.

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The amateur alien hunters used photos obtained from NASA as the bases for their announcements of these alleged UFOs.

Skeptics, however, say these conclusions are glaring examples of "pareidolia", or a trick in which our mind makes us see things that aren't there because we want to believe they're there. Common examples of pareidolia include seeing faces or images in clouds or the Man in the Moon.

This alleged UFO find on Mars was reported on March 27 by two YouTube anomaly hunters, Mars Moon Space Photo Zoom Club (MMSPZC) and Paranormal Crucible, said The Inquisitr.

MMSPZC said it discovered the saucer UFO embedded in the soil in the Martian region of Aram Chaos (2.6°N, 21.5°W) near the canyon Valles Marineris and Ares Vallis. The photos were taken by NASA's Mars Orbiter Camera (MOC) aboard the Mars Global Surveyor (MGS) spacecraft launched in 1996.

The MOC returned 243,668 images while in orbit around Mars before the loss of the MGS in 2006.

Probably the most famous photos taken by the MOC was a series of images showing about 10 different heart-shaped features on the surface of the Red Planet.

MMSPZC claims this saucer-shaped structure isn't part of the natural Martian terrain but an object of artificial construction probably abandoned on the surface "after it developed a fault and crashed".

Another UFO hunter said a close examination of the object suggests a metallic luster in sharp contrast to the Martian soil in which it appears partially embedded. The saucer also has a visibly curved or circular shape with sharp edges indicative of artificial construction.

UFO hunters estimate the flying saucer to be some 200 to 300 meters in diameter.

Last February, UFO hunters claim to have identified in photos a UFO "apparently abandoned" on the Martian surface. This UFO was discovered in the Candor Chasma region and reported by anomaly hunters Martian Archaeology.

Mars Archaeology described the UFO as "exposed ruins on Mars caused by a crashed flying saucer." The images show the site from different angles and appear to reveal a crash site.