Click on the person's name to go to the extended interview transcript:

David Sinclair: Dr. David Sinclair, associate professor of pathology at Harvard Medical School, talks about how these anti-aging genes work and the prospects of marketable anti-aging drugs.

Stephen Helfand: Dr. Stephen Helfand, professor of genetics and developmental biology at the University of Connecticut, discusses how the genes can lead to organisms living longer and what the ramifications of an older, healthier population may be.

Eri Gentry: Eri Gentry, an undergraduate at Yale University and a member of the Calorie Restriction Society, explains her decision to cut her calorie intake by two-thirds -- to about 1,350 calories a day -- and how it has been affecting her life.