The pursuit of immortality and the war against aging stretches through recorded history and is not confined to any single culture or civilization. It can be found in ancient mythology and legends, the dreams that drive conquerors and explorers, and the theories of scientists and philosophers. The mythical fountain of youth has yet to be found, but the quest for it has given birth to an industry dedicated to extending healthy life. Click through this gallery for a glance at some of the stories and characters from across the globe and through time that have colored this pursuit.