Searching for the perfect artificial sweetener--great taste with no Calories--has been the focus of chemical research for some time. Molecules such as sucralose, aspartamine, and saccharin owe their sweetness to their size and shape. One theory holds that any sweetener must have three sites that fit into the proper taste buds on the tongue. This theory is appropriately known as the triangle theory. Research 3 artificial sweeteners to develop a model to show how the triangle theory operates.