Nelson Fausto The Greek myth of Prometheus with its picture of a vulture feasting on its chained victimhas traditionallyprovided a visualimageofliverregeneration. Itis apowerful and frightening representationbut ifone were to substitute the vulture by a surgeon and Prometheus by a patient laying on a properly prepared operating table, the outcomeoftheprocedurewould not differ significantlyfrom that describedbyGreek poets. Yet few of us who work in the field have stopped long enough to ask where this myth originated. Did the poet observe a case of liver regeneration in a human being? Was it...