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Neutrinosareelementary particlesaremasslessand unchargedmetalthat canpenetrate the surface. Some of theneutrinois penetratingyour bodywhile readingthis article. Particles"phantom" isproduced in thecore ofstarsandsupernovaexplosions.The detectoris placedbelow thesurface of the earth, beneaththe surface of thesea, orinto a large chunkof iceas partofIceCube, aspecial projecttodetect the presence ofneutrinos.