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An all-sky image from the European Space Agency's Planck spacecraft, released March 21, 2013 provides the most detailed look yet at the imprint left behind by the big bang in the cosmic microwave background. Patterns of temperature fluctuations, shown in shades of red and blue, serve as a “baby picture” of the universe when it was just 370,000 years old. The image suggests that the universe is 100 million years older than scientists thought it was, with more matter and less dark energy than they previously thought. (Photo by ESA-Planck Collaboration via AP Photo)
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