Lazarus Long is a fictional character featured in a number of science fiction novels by Robert A. Heinlein. Born in 1912 in the third generation of a selective breeding experiment run by the Ira Howard Foundation, Lazarus (birth name Woodrow Wilson Smith) becomes unusually long-lived, living well over two thousand years with the aid of occasional rejuvenation treatments. Heinlein "patterned" Long on science fiction writer Edward E. Smith, mixed with Jack Williamson's fictional Giles Habibula.His exact (natural) life span is never revealed. In his introduction at the beginning of Methuselah's Children, he claims he is 213 years old. Approximately 75 years pass during the course of the novel, but because large amounts of this time are spent traveling close to the speed of light, the 75-year measurement is an expression of the time elapsed on Earth, rather than time seen from his perspective. At one point, he estimates his natural life span to be around 250 years, but this number is not expressed with certainty. He acknowledges that such a long life span should not be expected as a result of a mere three generations of selective breeding, but offers no alternative explanation except by having a character declare: "A mutation, of course — which simply says that we don't know".In Methuselah's Children, Long mentions visiting Hugo Pinero, the scientist appearing in Heinlein's first published story "Life-Line", who had invented a machine that precisely measured lifespan. Pinero refuses to reveal the results of Lazarus's reading and returns his money. The promotional copy on the back of Time Enough for Love, the second book featuring Lazarus Long, states that Lazarus was "so in love with time that he became his own ancestor", but this never happens in any of the published books. In the book, Lazarus does travel back in time and is seduced by his mother, but this takes place years after his own birth. Heinlein did, however, use just such a plot device in the short story " '—All You Zombies—' ", in which a character becomes both of his own parents. A rugged individualist with a distrust of authority, Lazarus drifts from world to world, settling down periodically and leaving when the situation becomes too regimented for his taste, often just before an angry mob arrives to capture him. The Lazarus Long set of books involve time travel, parallel dimensions, free love, individualism, and a concept that Heinlein named World as Myth — the theory that universes are created by the act of imagining them, such that even fictional worlds are real. Source: Wikipedia (en)