Muon

Muons lasted the merest billionth of a second. The Trions created muons on Regal as the fundamental working blocks of the system given that they produced the cheapest energy in N-Space. They were part of the collapse of the universe itself.

Vislor Turlough created the ARTEMIS drive using energetic muons, allowing him to create a rudimentary space-time vessel using a Style 976 Interstellar Hawk. (PROSE: Turlough and the Earthlink Dilemma) On Earth, the muon neutrino was discovered by Melvin Schwartz, whom the Sixth Doctor met. (AUDIO: The Juggernauts)