Lynx has a role in Greek, North American, and Norse mythology. To Native Americans, it was known as the "Keeper of Secrets." The Lynx is believed to have supernatural eyesight, and is able to see through objects. For this reason Lynx is often used as a symbol for revealing hidden truths and the psychic power of clairvoyance. In Greek lore when King Lyncus attempts to kill Triptolemus because of his desire for Demeter, he is turned into a Lynx. Lynx is also the name of a constellation that was defined by Johannes Hevelius in 1687.