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What Is Dark Energy?

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 Physics   |   Science
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Galaxies have been flying apart faster and faster since the early universe. Astronomers say the culprit is dark energy. But what is dark energy?

SUBSCRIBE: http://youtube.com/whatthephysics?sub

Host, Producer: Greg Kestin
Research, Writing: Samia Bouzid, Greg Kestin
Editorial Input from: Julia Cort, Ari Daniel
Filming, Editing, and Animation: Greg Kestin
Science consultant: Steven A. Rodney, Mark Trodden
Media courtesy of ESO, NASA
Special thanks: Entire NOVA team
From the producers of PBS NOVA © WGBH Educational Foundation
Funding provided by FQXi
Music provided by APM

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