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How to Brush Your Teeth in Space?

How to Brush Your Teeth in Space?

Canadian astronaut Chris Hadfield shows how astronauts brush their teeth in space. You might be surprised by what he reveals!

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5,000 Exoplanets: Listen to the Sounds of Discovery

5,000 Exoplanets: Listen to the Sounds of Discovery

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Richard Feynman - Very Big Numbers

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To Scale: The Solar System | Video | Abakcus

To Scale: The Solar System

A group of friends builds the first scale model of the solar system with complete planetary orbits: a true illustration of our place in the universe.

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