Despite the recent crash of Virgin Galactic spacecraft, people who have signed up for out of the world travel are gung ho about the space tourism.
Is it possible to extend lifespans to, say, 120 years, or longer, asks Devangshu Datta.
About 800 people already have paid or put down deposits for rides on SpaceShipTwo, a six-passenger, two-pilot suborbital spaceship owned by Virgin Galactic.