On August 27, 1956, at the Savannah River Plant, now Savannah River Site, Drs. Clyde L. Cowan, Jr. and Frederick Reines used P Reactor to detect the neutrino, a sub-atomic particle hypothesized in 1930 but unconfirmed until their experiment, one of the most significant in modern physics. In 1995 Dr. Frederick Reines was awarded the Nobel Prize in Physics for his and Dr. Clyde L. Cowan’s detection of the neutrino at the Savannah River Plant, and the Nobel citation called their experiment "a pioneering contribution that opened the doors to the region of ‘impossible’ neutrino experiments."