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Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford.
Discovery of cosmic microwave background radiation. The accidental discovery of cosmic microwave background radiation in 1964 is a major development in modern physical cosmology. Although predicted by earlier theoretical work around 1950, it was first discovered accidentally by American radio astronomers Arno Penzias and Robert Woodrow Wilson as they experimented with the Holmdel Horn Antenna.