A buoyancy problem involving a ping pong ball, an iron ball, a few strings, some water, and a set of scales is causing a few arguments on Reddit where it was posted. "Where would the scale tip?

Enter the “Pongsat” program – space experiments within a ping pong ball. Created by JP Aerospace, this free program allows anyone to create their own mini experiment and send it off to the ...

An curved arrow pointing right. NASA's Scott Kelly turned a ball of water and two hydrophobic paddles into an out of this world game of ping pong on the International Space Station. Story by Tony ...