Water flea
Media playback is unsupported on your device

Christmas Crackers: Day 10

In the run-up to Christmas, BBC Wales is taking a look back at some of the most-watched videos of the year.

In February, pupils in south Wales sent water fleas into space as part of an experiment aimed at monitoring the effects of space travel in humans.

The bugs, which have a similar biology to humans, are now being monitored by astronauts onboard the International Space Stations, who hope it will give them an insight into how they can prolong journeys into space.

Video repackaged by Phil John.

  • 10 Dec 2015
Go to next video: Christmas Crackers: Day 9