Why does math work the same in every language?
Math's Universal Melody
Why does math work the same in every language?

A kid in Tokyo writes "2 + 2 = 4" in her notebook. A kid in Cairo writes "٢ + ٢ = ٤" in his. A kid in São Paulo writes "2 + 2 = 4" in hers. Same answer, every time — even though those squiggles look totally different. How does math pull off this trick?
Here's the secret: math isn't about the symbols. Those squiggles — 2, ٢, 二 — are just nicknames we invented for the idea of two-ness. The idea itself lives somewhere deeper than language. It's the pattern you see when you hold up two fingers, or spot two birds on a wire, or grab two cookies from the jar.
