A virus is a microscopic organism that can replicate only inside the cells of a host organism. Most viruses are so tiny they are only observable with at least a conventional optical microscope.
Recognized by the Guiness Book of World Records as the MMO with the longest play time per player, and easily the oldest game on this list (launching four years ahead of World of Warcraft, way back in 2001), Runescape deserves mention because it's one of the most updated and popular games of any kind on the planet.
Guiding Light, America's longest running soap opera, airs final episode. In the end, the characters on television's longest-running soap opera lived happily ever after. The US show Guiding Light aired its final episode today, 72 years and more than 15,000 episodes after its first broadcast as a CBS radio programme in 1937. The show, the story of three families in fictional Springfield, USA, moved to television in 1952 and first broadcast in colour in 1967.