"longevous" . . "indefinitely prolonged lifespans" . . "Longevity" . "longer lives" . "Longevity" . "live for many, many years" . . "Longevity#Non-human biological longevity" . . "life span" . "longevity" . "longest-living" . "Chang Su" . "80 years" . "lifespan" . . "long-life" . "long" . "prolonged" . . "lengthen lifespan" . . "lived" . . "long life" . . "Lifespans" . . "longer lifespan" . . "oldest living person" . "lifespans" . . "trait of long life" . "much longer-lived" . . "long-lived" . "longevity drug" .