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Astronomers discover echoes from expansion after Big Bang

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

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...more

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
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Tiny temperature fluctuations of the cosmic microwave background (shown as color) trace primordial density fluctuations in the early universe. Astronomers announced on Monday that they had discovered what many consider the holy grail of their field: ripples in the fabric of space-time that are echoes of the massive expansion of the universe that took place just after the Big Bang. REUTERS/Harvard-Smithsonian Center for Astrophysics

Tiny temperature fluctuations of the cosmic microwave background (shown as color) trace primordial density fluctuations in the early universe. Astronomers announced on Monday that they had discovered what many consider the holy grail of their field:...more

Tiny temperature fluctuations of the cosmic microwave background (shown as color) trace primordial density fluctuations in the early universe. Astronomers announced on Monday that they had discovered what many consider the holy grail of their field: ripples in the fabric of space-time that are echoes of the massive expansion of the universe that took place just after the Big Bang. REUTERS/Harvard-Smithsonian Center for Astrophysics
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