The most persuasive argument for the genetic influence on lifespan is the different lifespan of species. The best explanation we have of this absolute and static lifespan is the concept of the Hayflick Limit—a genetic program that kills cells.  In 1961—going against the thinking at the time—biologists Leonard Hayflick and Paul Moorhead noticed that their cell cultures were dying after replicating (mitosis) a certain number of times.  But during this period Alex Carrel—a Nobel Prize winner in surgery—held the thinking that…

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Mario D. Garret  ©2016

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