Vital Signs with Dr. Sanjay Gupta

We all know about animals that hibernate., the ones who press slow down or pause on nearly all metabolic functions like heart rate, blood flow, brain waves and body temperature, only to wake up as if nothing happened. It's something humans have never done, but what if they could? And what if the act of hibernation in humans could prolong lives or even save them? Dr. Sanjay Gupta takes a look at the scientists and researchers around the world studying what happens on a molecular level when animals hibernate and how these superpowers could one day be harnessed to fight cancer, help heart attack patients, treat depression, and even go to Mars.