Here's where we derived the mass
of the dark-matter PARTICLE.
The Big Bang Theory Season 3, Episode 4
inventing a new
dark matter PARTICLE
The Big Bang Theory Season 11, Episode 13
of the Higgs boson PARTICLE,
and you said,
The Big Bang Theory Season 5, Episode 21
Professor Rothman urinated in
the PARTICLE physics wab again,
The Big Bang Theory Season 5, Episode 14
But Penny has no interest
in subatomic PARTICLE research.
The Big Bang Theory Season 3, Episode 15