Yale psychologist June Gruber interviews Leda Cosmides and John Tooby of UC Santa Barbara, co-founders of the field of evolutionary psychology, as part of Yale's Experts in Emotion series. The two describe how they first became interested in studying emotion through an evolutionary lens and walk through what they consider the central discoveries of their decades of research, including how emotions function as evolved programs for solving recurring adaptive problems. They discuss where they see the field heading next and close with advice for students who want to work on emotion research. The format is a structured conversation rather than a classroom lecture, moving from origins to findings to future directions, giving a compact overview of the evolutionary psychology approach to emotion from two of its founding figures.