Astronomers discover echoes from expansion after Big Bang

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The 10-meter South Pole Telescope and the BICEP (Background Imaging of Cosmic Extragalactic Polarization) Telescope at Amundsen-Scott South Pole Station is seen against the night sky with the Milky Way in this National Science Foundation picture taken in August, 2008. REUTERS/Keith Vanderlinde/National Science Foundation/Handout