
Madam Curie's DISCOVERY of radium
turned out to have great potential...
The Big Bang Theory Season 1, Episode 2

This article says the peak age for making
a Nobel Prize-winning DISCOVERY is 40.
The Big Bang Theory Season 10, Episode 22

I was using when
I made the DISCOVERY.
The Big Bang Theory Season 7, Episode 6

But when you make
a DISCOVERY like this,
The Big Bang Theory Season 11, Episode 10

It's a scientific DISCOVERY...
The Big Bang Theory Season 2, Episode 8