Turning a perfect sphere on the lathe looks simple — until the blank starts revealing its own flaws. Every cut must be controlled, balanced, and measured with absolute precision. As the corners ...

It’s an age-old riddle: if you have a perfect sphere with a perfectly reflective inner surface, will light bounce around inside it forever? The answer is pretty obvious when you think it through, but ...

Much has been made over the development of a rounder soccer ball for use in this year's World Cup. But Stanford math professor Keith Devlin tells Scott Simon the quest for a perfect sphere remains a ...