TIL a levitating coin shaped like a flying saucer was commissioned by Cameroon's national bank to be used as legal tender in that country, minted with help from Poland's Mint. A tiny motor hidden inside it creates a magnetic field between it and the specially designed base below it, making it float.

https://www.odditycentral.com/news/polish-mint-creates-worlds-first-le…
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https://www.reddit.com/r/todayilearned/comments/1fyftfo/til_a_levitating_coin_shaped_like_a_flying_saucer/