UCSD's Charles Zuker explores the neurobiology of taste, smell and vision. I recomend listen this master class, he is a great and cleaver speaker and teacher
Charles S. Zuker is an American molecular geneticist and neurobiologist of Chilean descent. His lab has contributed to our understanding of mammalian taste, in collaboration with Nicholas Ryba's laboratory at the NIH beginning in the 1990s. Prior to working on mammalian taste, his lab focused on visual signal transduction pathways in Drosophila melanogaster (fruit fly). He is an investigator of the Howard Hughes Medical Institute.
Zuker and his laboratory team have made advances in the understanding of sight and hearing. They've also discovered taste receptors for four of the five tastes: sweet, sour, bitter, and "umami" (savory). Salt is the fifth, and it's only a matter of time before Zuker tracks it down.
Zuker has recently been elected as a member of the United States National Academy of Sciences. After nearly 20 years at University of California, San Diego, his new appointment at Columbia University begins in 2009.