Anti-aging, fight aging, turn back the clock, stop aging, reverse aging.

FORBES: When Do We Become "Old"?

Some choose to defiantly fight the effects of aging by ignoring the prominent warning signs and refusing to seek additional guidance from coaches, trainers and teammates.

FORBES: Connect

Guarente and Kenyon are among the co-founders of Elixir Pharmaceuticals , a startup that hopes to turn its work into medicines to slow aging and fight a litany of diseases from cancer to heart disease and diabetes.

FORBES: Starvation--And Long Life--In A Pill?