How astronauts clean their teeth... and other space oddities

Earlier this year, now-retired Canadian astronaut Colonel Chris Hadfield returned to Earth after a five-month mission that ran dozens of scientific experiments dealing with the impact of low gravity on human biology. During the mission he made nearly 70 videos about day-to-day spaceship living for the Canadian Space Agency, scoring millions of views in the process.

We have no idea how we missed them until now.

Here are some of his most popular efforts:

How to wash your hands in space ...

How to make a sandwich in space ...

How to clean your teeth in space ...

How to cry in space ...

How to sleep in space ...

Bonus for grown-ups (though we were pretty jazzed by the other stuff too!): As a grand finale, Chris filmed David Bowie’s Space Oddity on board the International Space Station. And it's AWESOME.

What's your favourite science fiction movie?