The original post: /r/todayilearned by /u/thedavejay on 2025-01-21 15:49:25.

Original Title: TIL that in 1917, during World War I, the British Army tried to train seagulls to poop on German U-boat periscopes to obscure their view. They even tested it with fake periscopes on beaches, but the gulls were more interested in stealing sandwiches than sinking submarines.