(Dinosaurs, Meteors and Scientific argumentation.) What caused the extinction of dinosaurs? What theories have been derived from what evidence about this extinction? This course will examine how scientists go about convincing others by focusing on this topic. In 1980, scientists from disparate disciplines advanced the theory that the impact of a meteor 66 million years ago set in motion the events that resulted in the extinction of some three-quarters of Earth's species, including dinosaurs. It was only in the 1990's that the larger scientific community came to the consensus around that notion. And there is an ongoing research question of why did the meteor strike then in the Yucat√°n Peninsula? In this seminar we will explore how scientists use observational evidence and calculations to advance persuasive arguments. This includes looking at the incomplete nature of contemporaneous scientific evidence as well as considering the questions of skeptical paleontologists, geologists and astr