Suspended Animation

Read this wikipedia article about Suspended Animation, and think about traveling to mars.

Here's a taste, "In July 2005 scientists at the University of Pittsburgh's Safar Center for Resuscitation Research announced they had managed to bring dogs back to life, most of them without brain damage, by draining the blood out of the dogs' bodies and putting an ice cold solution into their circulatory systems, which in turn keeps the bodies alive in stasis. After 3 hours of being clinically dead, their blood was put back into their circulatory systems, and the dogs were revived by delivering an electric shock to their hearts. The heart started pumping the blood around the frozen body, and the dogs were brought back to life."