Watch | Dazzling video of colourful liquid in space

Astronauts on the International Space Station dissolve an effervescent tablet in a floating ball of water. In footage released on YouTube, Astronaut Scott Kelly extracts a floating ball of water, into which he inserts coloured ink and an effervescent tablet to watch it dissolve and release gases in mid-air. The images were captured using a camera capable of recording four times the resolution of normal high-definition cameras.