Before walking on the moon, future astronauts may go for a swim. The famed Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center in Houston has trained hundreds of spacewalkers since 1992 ...

When NASA astronauts train for moonwalks, they don't start on the lunar surface — they often begin underwater. For decades, NASA's Neutral Buoyancy Laboratory (NBL) has been the premier training ...