Rediscovering Smell: A Deep Dive into Our Most Underestimated Sense

The book by olfaction researcher Jonas Olofsson explores the often-overlooked significance of smell in human life. Arguing that our olfactory brain collaborates with other brain regions to interpret smells, Olofsson seeks to elevate the public's perception of this underestimated sense. Despite its crucial role, many people take smell for granted, as highlighted by a 2021 survey where only 15% of respondents deemed it more valuable than their pinky toe. With the COVID-19 pandemic bringing attention to the loss of smell, this book provides a timely exploration of its importance.

In his work, Olofsson delves into historical contexts where odors played vital roles in spirituality, morality, and medicine. In ancient times, people used burnt offerings to reach the gods, believing the smoke ascending to the heavens connected them with divine entities. Similarly, medieval beliefs held that devils emitted a foul stench, such as flatulence, serving as a moral indicator. Doctors in bygone eras also utilized scents for diagnosing and curing illnesses, showcasing the multifaceted applications of smell.

Olofsson employs a "cognitive perspectiveswamp" of research to illustrate his points, referring to studies on aromatherapy, e-noses, and digital smell technologies. This comprehensive approach underscores the evolving understanding of smell and its integration with modern science. He also shares successes in smell-based brain training, suggesting the potential for enhancing cognitive functions through olfactory exercises.

"The sense of smell does not act on its own," Jonas Olofsson explains, "but is smarter than that—it takes in all the cues in the environment and assesses them using all our accumulated knowledge."

This perspective challenges readers to reconsider the sophistication of their sense of smell. Olofsson's book aims to increase understanding and appreciation for what he describes as the "special intelligence of the nose."

During the pandemic, Olofsson played a pivotal role in public health awareness by emphasizing the importance of monitoring changes in one's sense of smell.

"I like to think I helped protect the public when I repeated to journalists in an almost parrot-like manner that readers and listeners who suddenly lose their sense of smell should isolate themselves immediately," he stated.