
Are you familiar
with Darwin's OBSERVATION...
The Big Bang Theory Season 4, Episode 18

We just want to keep her
a little longer for OBSERVATION.
The Big Bang Theory Season 7, Episode 15

His OBSERVATION of high-energy positrons
has provided the first evidence...
The Big Bang Theory Season 2, Episode 11

I have a conclusion
based on an OBSERVATION.
The Big Bang Theory Season 1, Episode 10