During Expedition 40 in the summer of 2014, NASA astronauts Steve Swanson and Reid Wiseman — along with European Space Agency astronaut Alexander Gerst — explored the phenomenon of water surface tension in microgravity on the International Space Station. The crew "submerged" a sealed GoPro camera into a floating ball of water the size of a softball and recorded the activity with a 3-D camera. (Vid
![Space Station Astronauts Grow a Water Bubble in Space](https://cdn-ak-scissors.b.st-hatena.com/image/square/b8015d578948a07937426baadcee57cf52bb3e67/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2F9ZEdApyi9Vw%2Fhqdefault.jpg)