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A recent observation by the Auger Observatory group presents evidence for cosmic rays above 5.6 10 19 eV -(56 EeV) being 'predominantly protons' coming from Active Galactic Nuclei. If, as would be expected, the particles above the ankle at about 2 EeV are almost all of Extragalactic origin then it follows that the characteristics of the nuclear interactions of such particles would need to be very different from conventional expectation -a result that follows from the measured positions ofdoi:10.2174/1874381100902010095 fatcat:fdmurfh3rvcxxn65ec347otrzi