text: It has long been thought that the crack results from the tip of the whip traveling fast enough to break the sound barrier and create a sonic boom. But the new findings suggest otherwise. Apparently, it's the loop in a whip that is the real noisemaker\n\nhttp://www.hypography.com/article.cfm?id=32479\n\n\nhttp://www.sciam.com/article.cfm?articleID=00088B33-8E92-1CEE-93F6809EC5880000