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A large light-mass component of cosmic rays at 1017–1017.5 electronvolts from radio observations

Cosmic rays are the highest-energy particles found in nature. Measurements of the mass composition of cosmic rays with energies of 1017–1018 electronvolts are essential to understanding whether they have galactic or extragalactic sources. It has also been proposed that the astrophysical neutrino signal comes from accelerators capable of producing cosmic rays of these energies. Cosmic rays initiate air showers—cascades of secondary particles in the...

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Vast assembly of vocal marine mammals from diverse species on fish spawning ground

Observing marine mammal (MM) populations continuously in time and space over the immense ocean areas they inhabit is challenging but essential for gathering an unambiguous record of their distribution, as well as understanding their behaviour and interaction with prey species. Here we use passive ocean acoustic waveguide remote sensing (POAWRS) in an important North Atlantic feeding ground to instantaneously detect, localize and classify MM...

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Liveblog: Scott Kelly comes home from space tonight after nearly a year

After 340 days in space Scott Kelly is ready to come home and jump in his pool. (credit: NASA)

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2016-03-01T21:30:00-06:00

Tonight, after 340 days in space, seasoned astronaut Scott Kelly will fly home from orbit inside a Soyuz spacecraft.

By all accounts, Kelly has had a sterling turn of work aboard the station during the last 11-plus...

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OPM, Education Department CIOs resign under fire from Congress

In testimony last summer, OPM CIO Donna Seymour said that systems couldn't simply have encryption added, because some of them were over 20 years old and written in COBOL. (The statement was only partially accurate.)

The Office of Personnel Management's chief information officer, Donna Seymour, resigned Monday, two days before she was scheduled to face...

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