Anachronisms are interesting! They occur when something is placed in a time period where it doesn’t belong, like a modern object or idea being depicted in a historical setting. For example, if a character in a film set in the 1600s were to use a smartphone, that’d be an anachronism.
It’s often used in literature, film, or art either as a deliberate choice (for humor, or to make a point) or sometimes just as a mistake. Have you encountered any particularly memorable anachronisms in something you’ve read or watched?