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neutrinos. based on size and mass, neutrinos are barely a thing at all, but do, technically, qualify to be called things. resulting from radioactive decay, neutrinos come in three "flavors", and according to this article, are elementary particles that often travel close to the speed of light, lack an electric charge, are able to pass through ordinary matter almost undisturbed and are thus extremely difficult to detect. Neutrinos have a minuscule, but nonzero mass. |
