
I really miss GRAVITY.
The Big Bang Theory Season 6, Episode 3

No, there isn't. Only loop quantum GRAVITY
calculates the entropy of black holes.
The Big Bang Theory Season 2, Episode 2

Ah, GRAVITY--
thou art a heartless bitch.
The Big Bang Theory Season 12, Episode 24

...she's unjustifiably arrogant
about loop quantum GRAVITY...
The Big Bang Theory Season 2, Episode 2

...for this university's
six-loop quantum GRAVITY calculations.
The Big Bang Theory Season 6, Episode 9