Bats, bears and some birds do it, but humans can’t: hibernation. Animals hibernate to save energy through long cold winters. Sounds appealing, doesn't it? NASA wants to know if human hibernation is possible. Why? Because it because it would make the trip to Mars a hell of a lot less boring.
You've suffered a gunshot wound. You're losing blood and your organs are failing fast. Would you let doctors drain your blood and chill your body to 10 ºC, entering a state of clinically-dead, suspended animation, to buy precious time that may save your life? This radical technique is being trailed by a group of doctors at the University of Pittsburgh Medical Center in Pennsylvania.