In reference to these alternative options, there is one in particular that was discovered by NASA and currently used by the army. It was discovered back in the early seventies by NASA while performing studies on astronauts and how space travel effects the human body. Astronauts returning from the Skylab 2 mission reportedly grew by up to three inches while in space. Within 10 days of returning, their heights returned to normal confirming the theory that our spines can be decompress. By decompressing the spine, it has been proven to be a very effective in eliminating bulging disc and general back pain.