Explore November 30 in science history: Mark Twain’s unusual connection to Halley’s Comet, Jagadish Chandra Bose’s pioneering work on radio waves and plant responses, and the meteorite that struck Ann Hodges in 1954. These stories connect astronomy, physics and biology with ready-to-use classroom discussion ideas. Discover interactive activities, slides, spreadsheets and printable resources in the November and December Science on This Day calendars.