IE 11 is not supported. For an optimal experience visit our site on another browser.

This Is the Closest You Can Get to Zero Gravity Without Leaving Earth

02:35

NASA's Neutral Buoyancy Lab is a massive pool with a full-size replica of the International Space Station inside. It's the closest an astronaut can get to training for zero gravity without leaving earth. NASA extravehicular specialist Art Thomason explains while NASA astronaut Jessica Meir goes for a swim.