Their existence is vehemently denied by a group kn
Their existence is vehemently denied by a group known as the  autodynamicists, who call them "the ether of the 20th century."  Cowan and Reines managed to detect their unmistakable signature in  1956, an difficult task because they because they only interact  with matter via the weak force. This finally confirmed a  hypothesis advanced 25 years earlier by Wolfgang Pauli. FTP, name  this nearly massless particle emitted in nuclear decays.
Their existence is vehemently denied by a group known as the  autodynamicists, who call them "the ether of the 20th century."  