I already love space and GoPro videos, and this is pretty much the ultimate combination of the two! These three astronauts on the International Space Station pass some time submerging a GoPro camera inside a floating bubble of water. It isn't the effect the bubble had on the camera that I liked the most- it's the innocent glee they had in doing this, like a bunch of kids discovering a new game! So fun. But, if you're curious, the reason that water does this in space has to do with surface tension. Magnetic-like molecules on water’s surface cause the surface to behave like an elastic skin. Each molecule is pulled with equal tension by its neighbors. The tight-knit group forms the smallest possible area — a sphere. I've attached a second video of cool water tricks in space from the ISS!