Number 78 (Story #2), May 4, 1992 by Phillip F. Schewe and Ben Stein THE HIGHEST ENERGY COSMIC RAYS arise when charged particles collide with "wandering" magnetic fields in our galaxy, according to scientists at Oxford. Developing a theory first proposed by Enrico Fermi in 1949, the scientists suggest that certain particles, already accelerated to high energies (10**13 to 10**14 eV per nucleon) in supernovas, can be driven to even higher energies (10**18 to 10**20 eV) through numerous interactions with irregular magnetic fields, perhaps those due to shock fronts of other supernova remnants in the galaxy. (Nature, 16 Apr. 1992.)