"Observatory detects extragalactic cosmic rays hitting the Earth", by Louise Lerner, UChicago News
Department in News: September 20, 2012
"This result unequivocally establishes that ultra-high-energy cosmic rays are not just random wanderers of our nearby universe," said Paolo Privitera, UChicago professor in astronomy and astrophysics, who heads the U.S. groups participating in the project.