Here are two talks from TED on aging. The first one predicts that at a certain point in the future when science is able to repair the damages due to metabolism faster than the generation of these damages, human can live as long as s/he likes.
The second talk looks at areas in the world where there are exceptionally many people over 100 years old. In particular, draws out the nine basic characteristics in these "blue zones" to give us a hint of how we can live longer.
