or under the icy SURFACE
of Europa?
The Big Bang Theory Season 11, Episode 10
Then a laser will map
the reflective SURFACE...
The Big Bang Theory Season 6, Episode 5
in the Earth's
SURFACE.
The Big Bang Theory Season 7, Episode 3
Can you recommend a SURFACE
The Big Bang Theory Season 7, Episode 18
that's just a doodle of
a hyperelliptic Riemann SURFACE.
The Big Bang Theory Season 7, Episode 20