Etched into the dry sand of Australia’s barren outback is the world’s largest geoglyph, known as “Marree Man,” an enormous figure of an Aboriginal man hunting birds or wallabies with a throwing stick. Unlike other anthropomorphic geoglyphs found around the world, which were constructed by ancient civilizations, Marree Man was carved into the landscape only 16 years ago. However, its very existence presents one of the greatest mysteries Australia has ever seen; the geoglyph is so large that it is viewable from space, yet not a single witness can attest to its creation and to this day, its creator and the reason for its construction remain unknown.