Natural high energy events from cosmic ray collisions with upper atmospheric atoms and molecules led to the discovery of many key subatomic particles, for examples: the positron, pion, muon, V-particle, and kaon. In fact, a disproportionate number of Nobel Prizes in Physics were awarded with ties to research in cosmic rays. The continued success of high energy collisions has surpassed most physicists expectations using accelerators like those of CERN, HERA, Fermilab, Brookhaven, Stanford, etc. The recent abandonment of superconducting supercolliding technology in Texas is the unfortunate result of a feasibility study that Planck energy domain or the GUT energy threshold for the X-boson of supersymmetry is not attainable by applying the standard model of elementary particles (electroweak and quantum chromodynamics). Nevertheless, the natural components of cosmic rays are still 88% protons, 9% helium and heavier nuclei, 2% energetic electrons, ranging in energy from 10^9 eV to 10^20 eV. The sources are solar, supernovas, galactic, and extragalactic. The mystery lies at the extreme high energy of extragalactic sources. Seemingly, interstellar or intergalactic outer space possesses powerful accelerators beyond our wildest dream.


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