The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...
New research suggests that these ultra-high energy rays derive their energy from magnetic turbulence. Ultra-high energy cosmic rays, which emerge in extreme astrophysical environments -- like the ...
The most energetic breed of particle ever observed might be more than meets the eye — or the particle detector. Physicists once thought that these rare particles, called ultrahigh-energy cosmic rays, ...
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