An curved arrow pointing right. Astronaut Jack Fischer demonstrates what happens when you blow bubbles into a water bottle in zero-gravity. You can follow him on Twitter here. Produced by Jasper ...

Can you predict which bottle will fall to the ground first? Do you think gravity causes problems, or is it useful? What would happen if we didn’t have gravity? Rockets need a lot of upward force ...

The crew of the International Space Station (ISS) had some fun in zero-gravity conditions, recent footage shows, with astronaut Matthew Dominick showing that squeezy ketchup bottles really come into ...