“We couldn’t find any showstoppers, any reason it wouldn’t be possible,” said aerospace engineer John Bradford on the possibility of human hibernation. Bradford is an aerospace engineer for NASA conducting research on human hibernation, but he is not the only person interested in this possibility. Scientists are interested in human hibernation because it could be useful for deep-space travel. Hibernating their way to their destination, astronauts could pack less food and water, making the trip less expensive. For every additional pound, the cost for space travel goes up. Not only would there be a cost benefit, but it could also potentially prevent psychological stress that is associated with long periods of isolation in deep space.