Sharp-eyed internet users spotted the animal in an official NASA photograph taken by the Curiosity Rover soon after it landed on Mars in 2012.
Conspiracy theorists believe the picture reveals a top-secret NASA experiment which the public were not informed about due to animal rights violations.
The UFO Sightings Daily website said: “It is really amazing and strange. I guess that’s why I love this one so much. It’s a cute rodent on Mars.”
(Image Credit: Nasa & express.co.uk)
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