Why do bubbles always turn into spheres?
Lazy Bubble Math
Why do bubbles always turn into spheres?
You blow a bubble through a round wand, and it comes out round. You blow it through a square wand, and still — round. You blow it through a star-shaped wand, and the bubble just laughs at you and makes itself into a perfect sphere anyway. What's going on?
Here's the secret: bubbles are lazy. Well, soap film is lazy. It's always trying to do the least amount of work possible. And for a bubble, "work" means how much surface it has to stretch across.
