![Um, it used to be string theory,
now it's dark matter.
Um, it used to be string theory,
now it's dark matter.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Um, it used to be string THEORY,
now it's dark matter.
The Big Bang Theory Season 9, Episode 8
![I hope you know, with these
new data supporting your theory,
I hope you know, with these
new data supporting your theory,](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I hope you know, with these
new data supporting your THEORY,
The Big Bang Theory Season 12, Episode 13
![I've devoted the prime
of my life to string theory
I've devoted the prime
of my life to string theory](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I've devoted the prime
of my life to string THEORY
The Big Bang Theory Season 7, Episode 20