
about RELATIVITY,
was always rooted in twins.
Westworld Season 3, Episode 8

...of the equations of general RELATIVITY
and hydrodynamics...
The Big Bang Theory Season 6, Episode 24

Einstein's RELATIVITY equations
pop out.
The Big Bang Theory Season 11, Episode 13

...with general RELATIVITY
than does string theory.
The Big Bang Theory Season 2, Episode 2

Just explaining the theory of RELATIVITY.
The Big Bang Theory Season 6, Episode 5