NOVA scienceNOW: Can We Live Forever?

The quest to extend human life is examined. The report ponders lessons from a still-running 1966 Volvo (with 2.7 million miles on it); checks on scientists seeking to create an organ-transplant system that uses custom-grown organs; details the commonality between active ninetysomethings and long-living worms; and explores what hibernation could do for the human body. It also looks at an alternative to physical life that could, theoretically, allow people to live forever: computer avatars.