The Pierre Auger Observatory has detected more muons from cosmic-ray showers than predicted by the most up-to-date particle-physics models.

The planned upgrade of the Pierre Auger Observatory, AugerPrime, is featured as the cover story in the June 2016 issue of the CERN Courier,  an international journal of high-energy physics whose readership spans the globe.

Scientists home in on the make-up of cosmic rays, which are more nuanced than previously thought.

Das Pierre-Auger-Observatorium detektiert die energiereichsten Teilchen im Universum.

Do the most energetic particles in the uni-verse come from supermassive black holes? New results from the Pierre Auger Observatory make that case.

The Pierre Auger Collaboration has begun the public release of one percent of the cosmic-ray events recorded by the Observatory in Argentina. New cosmic-ray data—about 70 events per day—will be posted on a daily basis.