One of the most popular candy commercials of all time asks: How many licks does it take to get to the center of a Tootsie Pop? There have been several experiments trying to nail down this sweet mystery. A group of engineering students at Purdue University made a licking machine that measured it took 364 licks, however, student volunteers only took 252. Meanwhile, students at the University of Michigan measured 411 licks on their licking machine. So the jury is still out on this question.
