Whether it’s one or all of your knuckles, you may wonder what causes the cracking sound. Although interesting, “cracking joints” and “popping knuckles” are not fully understood. In fact, cracking ...

The study, Vineeth Chandran Suja confesses, was born in a moment of frustration. As a graduate student at École Polytechnique, he had to design a research project for a class on biomechanics. He was ...