Mental Floss

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What does "41" mean in slang? Here's how a seemingly random number became Gen Alpha and Gen Z's latest inside joke after 6-7.

Paul Anthony Jones














Ever wonder why your dime and quarter have tiny ridges on the edge? It’s not just for grip—it’s a genius invention from the 1600s that saved the world’s currency from thieves.

Matt Soniak, Nitya Rao