Remember the toy Comeback Kid? Weeble? Or maybe you called it roly-poly toy? You know, that little guy who stood back up on his round bottom every time, no matter how you pushed it. That was because he had a weighted sphere (his bottom was much heavier and from a different material, therefore, he was inhomogeneous) and a very low center of mass. He actually had a stable point of equilibrium. In 1995, world-famous Russian mathematician Vladimir Igorevich Arnold proposed that a class of convex, homogeneous bodies, which, when resting…
