VIDEO: This is how you wash your hair in space

Astronaut Karen Nyberg explains one of the biggest questions about life in space: How do you wash your hair when you can't shower? 

The key appears to be no-rinse shampoo, which sounds like something lazy folks down here on the ground might enjoy, as well. But by far the coolest part is that the humidity from Nyberg's hair gets repurposed in the space station's water processing system -- and eventually becomes drinking water again!