Hypnos comes from the name of his Latin counterpart, Somnus. (in- "not" + somnus "sleep"), as well as a few less-common words such as "somnolent", meaning sleepy or tending to cause sleep and hypersomnia meaning excessive sleep, which can be caused by many conditions (known as secondary hypersomnia) or a rare sleep disorder causing excessive sleep with unknown cause, called Idiopathic Hypersomnia. 3D model of "Bronze head of Hypnos" via laser scan of a cast of British Museum's bronze. Hypnos In Greek mythology, Hypnos (; , "sleep") is the personification of sleep; the Roman equivalent is known as Somnus. In the
Greek mythology in popular culture of the god of medicine, Asclepius. Today's medical professionals hold a similarly honored position as did the healer-priests of Asclepius. The American colonial revolutionary, Thomas Greenleaf, subtitled his newspaper ""The Argus"" after the mythological watchman and took the slogan "We Guard the Rights of Man." The Pegasus appears frequently on stamps, particularly for air mail. In 1906, Greece issued a series of stamps featuring the stories from Hercules' life. Australia commemorated the laying of an underwater cable linking it to the island of Tasmania through a stamp featuring an image of Amphitrite. The United States military has used Greek mythology