New research suggests that scientists are getting closer to unlocking the secrets of aging. Some claim to have extended the life of a worm to the human equivalent of living 400-500 years. The question is: Do you really want to live that long? You'd probably get to knock a lot off your bucket list, but at some point it's unsustainable, right? We'd run out of resources if there was no natural death rate; however, long-term space travel might be made feasible.