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Neutrinos from space rain down from all directions

By tracking 35,000 high-energy particles, scientists find no single source

10:56am, April 10, 2014

NEUTRINO CENTRAL  The IceCube Laboratory near the South Pole collects data from nearby underground sensors and picks out the detections most likely to have been triggered by neutrinos from deep space.

SAVANNAH, Ga. — High-energy neutrinos from as far as the edge of the observable universe are pelting Earth from all directions, researchers announced April 7 at a meeting of the American Physical Society. The conclusion is based on a new analysis of data from IceCube, the enormous underground experiment near the South Pole that detected the first high-energy space-borne neutrinos in 2013.

“It’s a very important step,” says Keith Bechtol, an astrophysicist at the University of Chicago, who was not involved in the research. “IceCube neutrinos open a window into the very distant and high-energy universe that is extremely difficult to access by any other means.”

Neutrinos, unlike every other subatomic particle, provide that window because they are electrically neutral and rarely interact with matter. By detecting

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