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Episode: Episode 11: A Universe of Dark Energy

The discovery of dark energy was one of the biggest surprises in astronomy. Instead of a nice, predictable expanding Universe, acted on only by gravity, astronomers turned up a mysterious repulsive force accelerating the expansion of the Universe. Fraser and Pamela explain the evidence for a dark energy, and a few possible theories for what could be providing this repulsive force

Published: Nov. 20, 2006 Download (12MB audio/mpeg)

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