Hadrosaurs were one of the most successful groups of dinosaurs no matter how you look at it. They were on most continents, were really diverse (had a lot of species), and were really abundant (had a lot of individual critters).
On November 13th Andy Farke and Sarah Werning will be here live to answer your questions. They recently published the now famous 'baby dinosaur' paper. We welcome anyone to ask them a question regarding this paper, paleontology in general or any other topic before, during, and after the event.