You see this Merlyn? This is the face of a child who's mind you have blown.

"All of that happened before the Dinosaurs? But that had to take a long time...like a really really long time didn't it? Stuff doesn't change that fast or else humans would probably all have claws and wings and color changing skin and stuff." She doesn't want to say mutants because someone told her that was an offensive term, but that's more or less what she means.