Scene: A phone conversation.
Dana: (idly wondering) Do you think evolution is going to be all downhill now?
Dana: I mean, look at chickens. They used to be dinosaurs, and now look. That seems like a rather downward slope.
Mark: Yeah, but take a triceratops, for example. It weighed, what, several tons? And it still had a brain about the size of a chicken’s. That’s not really better, is it?
Dana: So it’s just a more streamlined version now, huh?
Mark: Yeah, it just lost all the extra weight.
Dana: So… chickens are like the supermodels of the dinosaur world?
Mark: Exactly. That’s why they have those spindly little legs.