Cold-Blooded or Warm Blooded?

This one is for Heavenly Mother.

Did you know that reptiles are cold-blooded? That means they don't make their own heat. They have to use the sun for heat. Mammals are warm-blooded, but I sometimes think I'm a cold-blooded mammal because I like dinosaurs so much.

But even though dinos are reptiles, sometimes they act like mammals and sometimes scientists don't know whether they were cold-blooded. I'm pretty sure spinosaurus was cold-blooded because he has that big fan on his back. He probably used that to get warm in the sun. It probably also made him look meaner so he could scare off other dinosaurs.