Ruchi: I was supposed to go back to India and get married, but I realized it wasn't what I wanted. So I called off the engagement and moved out here.
Raj: Well, if he wasn't your soul mate, he wasn't your soul mate.
Ruchi: Oh, God, please tell me you're not one of those.
Raj: One of whats?
Ruchi: I want to say teenage girls, but that sounds mean.

Sheldon: They're very different. Physics answers the question: what is the nature of the universe? Geology answers the question: you know, what'd I just trip over?

Sheldon: I've been modeling different types of dark matter and the traces they would leave on the zircon inside your meteorite.
Bert: What's this one here?
Sheldon: That's actually a dark matter model of my own creation. I call it the Cooper Boson.
Bert: Cool. I got to name a rock once. I named it Moderately Sedimented Shale. Guess I kind of pooped the bed on that one.

Raj: Are you saying that you don't believe two people fall in love?
Ruchi: Of course they do. It's just that what people call "love" is actually a series of biochemical reactions in the brain that fade over time.
Raj: Yes. Like the old song, "When a man has a biochemical reaction for a woman."