what happend to those dinos

Have you ever wonderd what happen to the dinosaurs.Some say there  was a fire happend...some say that flood,fire,&earthquake happend its a very big quiestion that scienetist have been trying to figure out for years,its a quiestion that has  paleontologist minds crazy.Please post a comment and tell me how you think this quiestion is going to be answerd and what you think happen to the dinosaurs.