The Pierre Auger Observatory has detected more muons from cosmic-ray showers than predicted by the most up-to-date particle-physics models.
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The highest energy cosmic rays remain elusive and mysterious, and their study requires extraordinary efforts.
Maxwell’s unified description of electric and magnetic phenomena is one of the greatest achievements of 19th century physics.
Cosmic rays are energetic particles, mostly atomic nuclei, raining down upon the Earth from the depths of the cosmos.
On Sep. 15, 2016 six Surface Scintillator Detector (SSD) stations were deployed with a single trip to the engineering array site.
On 21 September 2016 Alan Watson published an obituary on his collegue and friend Jim Cronin on the website of the international weekly journal of science Nature.
