Editor’s Note: Science has transformed our understanding of dinosaurs in the past two decades. Get caught up with what’s new in this five-part CNN series. Defined by their disappearance dinosaurs ...

Caitlin O'Kane is a New York City journalist who works on the CBS News social media team as a senior manager of content and production. She writes about a variety of topics and produces "The Uplift," ...

Missouri’s official state dinosaur: “Parrosaurus missouriensis.” (Image courtesy: Shutterstock) JOPLIN, Mo. — Like most states in the U.S., Missouri has a complicated geological past. Several times ...