Enterprise2001

Captain Jonathan Archer:
I'll bet you didn't know this; but at one time, most of my world was ruled by reptiles.

Commander Dolim:
I wasn't aware of that.

Captain Jonathan Archer:
A comet hit, around 65 million years ago. Caused a mass extinction. Most of the reptiles died out. Mammals became the dominant species.

Commander Dolim:
How unfortunate.

Captain Jonathan Archer:
Still, the reptiles might have come out on top, if it hadn't been for a slight disadvantage.

Commander Dolim:
And what was that?

Captain Jonathan Archer:
They had brains the size of a walnut. That's very small. Apparently, it's a constant in the universe.