Brushing Your Teeth in Space

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Canadian Astronaut Chris Hadfield demonstrates how to do this simple, but usually somewhat messy, daily routine in the zero-gravity of the International Space Station.

Ken is a husband and father from the San Francisco Bay Area, where he works as civil engineer. He became the Publisher of GeekDad in 2007, and the owner in 2010. He also wrote the NYT bestselling GeekDad series of project books for parents and kids to share.