Here was there conversation:

Muscle-head 1: So what've you been eatin?
Muscle-head 2: Lotta low-fat shit. Chicken, cottage cheese, salads and shit.
Muscle-head 1: Dude, chickens evolved from fuckin' dinosaurs!
Muscle-head 2: Whoa. What?
Muscle-head 1: Yeah man, read it the other fuckin' day. Fuckin' chickens used to be giant fuckin' dinosaurs!
Muscle-head 2: Fuck yeah man. No wonder I feel so strong.

(Taken from reddit)