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Scientists from the Telescope Array Collaboration have detected an ultrahigh-energy cosmic ray, a discovery that’s challenging our current understanding of exotic cosmic phenomena and their origins.

Construction is accelerating on a $17 million cosmic ray observatory west of Delta, Utah, thanks to two U.S. agencies: the Bureau of Land Management issued a permit, and the National Science ...

An unconventional telescope spreads across Utah's dry Bonneville lake bed. Made up of hundreds of giant rusty detectors, the instrument studies cosmic rays, the high-energy particles that come from ...