Trilobites: Why Do Cracking Knuckles Make That Sound? You Might Need a Calculator Researchers developed a mathematical model to test competing theories for what causes the popping sound that will either irritate you or signal relief. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:‘Allah’ Is Found on Viking Funeral ClothesAI nano-machines injected into humans will REPAIR bodies from the insideAustralia Debates: Does Warming Planet Really Need More Coal?Fraud Scandals Sap China’s Dream of Becoming a Science SuperpowerA Gun to His Head as a Child. In Prison as an Adult.Trilobites: It’s One of North America’s Quietest Places. Along Came a Bear.
