Every star, black hole, human being, smartphone and atom are all constantly pulling on each other due to one force: gravity. So why don’t we feel pulled in billions of different directions? And is there anywhere in the universe where we’d be free of its pull?

How far would you have to go to escape gravity? This TED-Ed lesson by Rene Laufer explains how gravity works, why astronauts float on the International Space Station, and the theoretical place ‘on’ Earth where we could escape gravity.

Follow this with a microgravity demo in the Willis Tower Skydeck elevator and Newton’s Three Laws of Motion.

Plus: Upside Down & Inside Out – OK Go in zero-g.

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