Reply to comment by manofredgables in eli5 perpetual motion is impossible but why haven't we made something that just goes on for a really long time that we then service so it can keep going? by FrozenKyrie

Reply to comment by DistortoiseLP in TIL on the night of 22-23 July 1945 USN Commander Eugene Fluckey sent a shore party from his submarine USS Barb (SS-220) to sabotage a railroad. The raiders became the only Allied force to invade mainland Japan in the war, and the Barb became the only sub in history with a confirmed kill on a train. by YankeeWalrus