Can we reset our biological clocks?

When we first sent men to the moon back in 1969, our life expectancy was about 70. Today we're still going to space, but we can expect to live about eight years longer. But what if, like space itself, age could be almost limitless?

Three of the leading scientists on aging all agree that either slowing our clock, or perhaps even resetting it, is no longer science fiction.

Dr. Nir Barzilai, at the Albert Einstein College of Medicine, said, "Aging can be delayed. Aging can be stopped. Aging can be reversed in several ways."