The Origin of Energy.

Since the end of the war the focus of interest in physical science has not been the atomic pile or the atom bomb but a family of unfamiliar sub-atomic particles known as mesotrons or mesons. Mesons are among the debris left when atoms in the earth's atmosphere are struck by cosmic rays, the mysterious super-powerful radiation that rains ceaselessly on the earth from outer space. The great interest in mesons arises from the fact that they are taking physicists into a new world. The release of atomic energy in the atomic pile and bomb conveys the impression that few secrets remain to the atom.