
It's the closest we've come
to a THEORY of everything,
The Big Bang Theory Season 11, Episode 13
![[SINGING]
There was a scientist who had a theory
[SINGING]
There was a scientist who had a theory](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
[SINGING]
There was a scientist who had a THEORY
The Big Bang Theory Season 8, Episode 21

...from bosonic string THEORY
to heterotic string THEORY.
The Big Bang Theory Season 1, Episode 15