Mark Bailey is a longtime science instructor who has taught multiple topics over a 30 year career in science education. He has also taught several OLLI classes. His subject areas of expertise include Astronomy, Earth Sciences, Geology, Biology and Natural History, European Prehistory, and Classical Mediterranean History with a Greek and Roman emphasis. He has taught every grade level in the sciences from kindergarten to graduate level college courses and emphasizes the latest up-to-date topic matter. He has extensively traveled throughout the world with an eye towards natural history and historical explorations.