I once had a brand-new pair of white sneakers that were rendered useless in about two weeks. No, I didn’t get them dirty. And yes, they fit me just fine. In fact, they were quite comfy. But they were ...

When shoes slide across a floor, wave-like deformations of the sole can generate squeaking. The pitch of the squeak depends on the rate at which deformations are generated. Bart Weber is at the ...