In 2000 a group of physicists finally found evidence of the tau type of this subatomic particle
[DOC] [TLE] Physicists Find First Direct Evidence for Tau Neutrino at Fermilab [PAR] Jul 20, 2000 ... We finally have direct evidence that the tau neutrino is one of the building blocks 
... Forty-four years ago, scientists discovered the first neutrino at the Savannah .... 
evidence for the tau neutrino at a colloquium on Friday afternoon, July 21, 2000.