A woman who had been looking for her cat found a mysterious hole with a strange drawing hidden inside it.
A magnet fisherman in England has reeled in a haul of 60 lead cubes inscribed with strange symbols.
Unexplained markings that have appeared on pavements around Thornhill have left officers scratching their heads.
Symbols found at Gobekli Tepe seem to confirm that a comet struck the Earth in the year 10,950 B.C.
Cryptographers have been attempting to decipher the text's mysterious symbols and diagrams for decades.
Students and teachers across Colorado have been encountering strange symbols at their universities.
An 11,000-year-old pendant unearthed in Yorkshire has been inscribed with a series of lines and symbols.