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Home / February 27th, 2010; Vol.177 #5 / Ancient dawn's early light refines age of universe / File
Cosmic dawn
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New maps of temperature and polarization in the distant universe confirm the existence of hot and cold spots in the cosmic microwave background radiation left over after the Big Bang. Rings around the spots reveal acoustic waves that were generated only in the early universe. Credit: NASA / WMAP Science Team


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