Penny has no interest
in SUBATOMIC particle research.
The Big Bang Theory Season 3, Episode 15
What exactly are SUBATOMIC particles?
The Big Bang Theory Season 3, Episode 10
Well, to paraphrase Mozart,
all the SUBATOMIC particles are there.
The Big Bang Theory Season 2, Episode 6
...weren't you,
you little SUBATOMIC dickens?
The Big Bang Theory Season 2, Episode 4
But Penny has no interest
in SUBATOMIC particle research.
The Big Bang Theory Season 3, Episode 15