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Strange Solar Gamma Rays Discovered at Even Higher Energies
There appear to be too many gamma rays coming from the sun. New higher-energy measurements reveal that this excess continues for a bit, then disappears — a cutoff that could help clarify what’s going on.
Cosmic Map of Ultrahigh-Energy Particles Points to Long-Hidden Treasures
Ultrahigh-energy cosmic rays twist and turn on their way to Earth, which has made it nearly impossible to identify the colossal monsters that create them.
Cosmic Rays May Explain Life’s Bias for Right-Handed DNA
Cosmic rays may have given right-handed genetic helixes an evolutionary edge at the beginning of life’s history.
A Cosmic-Ray Hunter Takes to the Sky
Angela Olinto’s new balloon experiment takes her one step closer to the unknown source of the most energetic particles in the universe.
The Particle That Broke a Cosmic Speed Limit
Physicists are beginning to unravel the mysteries of ultrahigh-energy cosmic rays, particles accelerated by the most powerful forces in the universe.