THE BOUBA/KIKI EFFECT

Which of these shapes looks like the sound "bouba", and which looks like the sound "kiki"?

People of all cultures agree on this, and now it's been found that baby chicks do too:

https://phys.org/news/2026-02-bouba-kiki-effect-baby-chicks.html

It may seem weird that sounds should robustly match with shapes, but I think it follows from physics - and living as we do in the physical world, it pays for us to make these associations.

For more:

https://en.wikipedia.org/wiki/Bouba/kiki_effect

Thanks to Alex at https://mathstodon.xyz/@WizardOfDocs@wandering.shop/116115329367345332 for pointing out the news about baby chicks!