most known genetic interventions in "c. elegans" increase lifespan by 1.5 to 2.5-fold. , the record for lifespan extension in c. "elegans" is a single-gene mutation which increases adult survival by tenfold. the strong conservation of some of the mechanisms of aging discovered in model organisms imply that they may be useful in the enhancement of human survival. however, the benefits may not be proportional; longevity gains are typically greater in "c. elegans" than fruit flies, and greater in fruit flies than in mammals. one explanation for this is that mammals, being much longer-lived, already have many traits which promote lifespan.