5 Essential Facts about Gravity Waves from the Big Bang - The Countdown #44

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On March 17th, physicists with the BICEP2 experiment announced they had detected the remnant of gravity waves in the cosmic microwave background, the light left over from the big bang. While still needing confirmation, the discovery lends weight to the idea that the early universe underwent rapid expansion. --SUBSCRIBE, future astronauts: more of The Countdown: Scientific American's website for more space news and information: to explore:BICEP2 Gravitational You Need to Know about Gravitational :Host/writer: Sophie BushwickProduction Assistant: Geoffrey GillerEditor: Kathryn FreeProducer: Eric R. Olson

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