The "Face on Mars": Originally captured by Viking 1, this rock formation resembles a human face. Mars rovers like Curiosity have taken better images, showing it to be an optical illusion, but it still sparks fascination.
Shiny Rock "Pinnacle Island": Discovered by the Opportunity rover, this strange, jelly doughnut-shaped rock appeared mysteriously in front of the rover, likely moved by its wheels, but its sudden appearance puzzled scientists.
The "Thigh Bone" Rock: Curiosity captured an image of a rock resembling a thigh bone, stirring speculation about Martian life. However, NASA clarified it's a weathered rock shaped by erosion.
The "Mars Light": A bright flash of light appeared in images taken by the Curiosity rover, leading to various theories, from camera artifacts to reflections from rock surfaces, yet the exact cause remains uncertain.
"Martian Blueberries": Opportunity discovered small, spherical formations composed of hematite. These "blueberries" are believed to have formed in water
"The Spheres": Curiosity found small, round, gray spherules on the Martian surface. These unusual formations differ from the "blueberries" and are a mystery in terms of their formation and composition.
The "Mars Rat": A rock formation that looks remarkably like a rat was spotted by Curiosity. While it's clearly a rock, pareidolia—the tendency to see familiar shapes in objects—makes it one of the more amusing and unexplained sightings.