sarahhascooties:

Coworker: So, how did the dinosaurs go extinct?

Me: Well, the short answer is, they didn’t. You see, birds are the dinosaurs that survived the KPG mass extinction and the dinosaurs that we think of are the nonavian dinosaurs, while birds are classified as avian dinosaurs. Now, to explain this, let’s go back to the beginning of life on earth. You see…