The steam engine was first developed in Ephebe. It was first used in a boat. Then it powered a tank, which was sabotaged and thus never went in to battle. (Thank you, History Monks.) It’s thus both an item, in the form of a technological advancement, and a concept, in the form of “Hey look what I invented. We can use it to make people’s lives easier” morphing into “Hey, look what I built! We can use it to kill people more efficiently!”  This never happens on the Roundworld.  Thanks for popping in for some Pratchips! We love all you guys. We love anyone who derives pleasure, enjoyment, or solace from anything we do. And we know you love your Pratchett!  Facebook page: Tales from the Drum Website: https://www.podpage.com/Tales-From-the-Drum/ YouTube channel: Tales from the Drum  email: medievalgnome@gmail. Discord server: Friends of Medieval Gnome Productions  Patreon page: Medieval Gnome Productions  Medieval Gnome Productions is-- CEF: Holly Golightly; Engineer: Ivy “Munchkin” McDoodles; host: The Medieval Gnome; and, our media consultant Artimas the Chill. The Turtle Moves GNU Terry Pratchett