Our ability to see, hear, touch, taste, and smell gives us five different ways to experience the world. But we prioritize some senses over others. For most of us, sight is primary, then comes hearing. Smell is usually at the bottom of the list. Our possessions may even top this innate sense. One survey asked 7,000 people between the ages of 16 and 30 to choose only two necessities from among a list of items: cosmetics, a car, passport, their phone, and their own sense of smell. About half chose to sacrifice smell. Perhaps it’s because smell plays a rather minor role in modern life. Unlike our ancestors, few of us would be able to identify or interpret the subtle scents found in the wild. Wendy Gardner, an aromatherapist in the United Kingdom, says smell may be our most primal sense. For example, newborns use scent to bond with their mothers. But …