Dark Energy

latitude 37.872222, longitude -122.268403

Physicists can't see it and don't know much about what it is, but dark energy makes up 70 percent of the universe. Meet one of the country's leading scientists trying to understand dark energy and the role it plays in causing our universe to expand.

Duration: 11:33
Original Air Date: Tuesday, Jul 22, 2008
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More by Topic: Physics, Astronomy
More by Location: Alameda County

 

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