Why do we have a GEOLOGY book?
The Big Bang Theory Season 7, Episode 20
and the Geology Department.
The Big Bang Theory Season 5, Episode 1
Hey, you want to hear
one of my GEOLOGY songs?
The Big Bang Theory Season 11, Episode 13
Wait. What's wrong with GEOLOGY?
The Big Bang Theory Season 7, Episode 20
Bert works for the
GEOLOGY department.
The Big Bang Theory Season 7, Episode 13