or under the icy SURFACE
of Europa?
The Big Bang Theory Season 11, Episode 10
...given the SURFACE area of this car
is about 60,000 square centimeters...
The Big Bang Theory Season 8, Episode 19
what do you say we get back
to SURFACE tension of domain walls?
The Big Bang Theory Season 9, Episode 10
Then a laser will map
the reflective SURFACE...
The Big Bang Theory Season 6, Episode 5
that's just a doodle of
a hyperelliptic Riemann SURFACE.
The Big Bang Theory Season 7, Episode 20