Paleontologists are scientists who study the fossil record, and often dinosaurs! The first known dinosaur bones were discovered in 1819 by William Buckland. Shortly after, there were two Paleontologists whose rivalry both helped discover, and sometimes destroy a lot of dinosaurs. Watch the video in the Think about Cope and Marsh. They had some traits that helped them, and some traits that didn't help them or others. What was a positive trait - what helped them be successful? What was a negative trait - what stopped them from being successful?