Charles Zuker has devoted his career to unraveling the neurobiology of the senses—especially taste, but he is quick to tell you that it’s not because of some inherent fascination with bitter, sweet, and salty truths. “The fact is that we don’t study the senses simply to understand the senses,” he explains. “We study the senses as an entry point—a tractable problem—in dissecting the mysteries of the brain.” And taste, he notes, is a particularly elegant system for plumbing those mysteries.