2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40679Charged cosmic rays have been measured up to macroscopic energies. Concerning neutrinos, the detection is still limited to terrestrial ones (apart from supernova production). A new way to search for extragalactic neutrinos is discussed.5 pages, NATO Advanced research Workshop, Morocco, March 2001High Energy Physics - Phenomenologytext