Conspiracy theorists and alien hunters are ever more convinced that life once existed on Mars as shown by a picture taken and transmitted back by NASA's Curiosity Rover in which a concrete coffin was allegedly visible.
Scientists, however, are not buying that a concrete coffin was once used and is now abandoned on Mars, The Daily Mail said.
Sightings such as the coffin on Mars fall on what experts termed as Pareidolia or the natural ability of the human mind to conjure up wild imaginations that lead to the recognition of known shapes and forms when focused on a particular object.
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