For listeners of James Nestor and Mary Roach, a fascinating tour of the science behind our most essential sense—and all we unleash when we stop and literally smell the roses

Our sense of smell guides our lives far more than our screen-heavy, sight-privileged era would suggest. It animates our experience of food and drink, helps us access memories, and strengthens our intimacy with each other. But, long considered our most “beastly” sense, the inner workings of smell have stumped scientists for centuries.

Now, cognitive scientist and leading smell researcher Jonas Olofsson uncovers the sophisticated biological processes that animate our olfactory system, with profound implications for how we perceive the world around us. Drawing from cutting-edge original research, Olofsson shows that not only is our sense of smell extraordinarily sensitive, its process of chemical exchange shaped human evolution on its most fundamental level. From the pheromones, environmental signals, and emotions we process with each breath, olfaction makes us the individuals we are. Moreover, smelling is an intellectual exercise, Olofsson argues, one that we have the remarkable capacity to strengthen and, with some effort, even regain after illness.