Note: Single-source report; awaiting corroboration.
Smells come from various sources and travel through a sensory pathway to the brain, enabling the perception of different aromas. This process is essential for daily life and safety.
According to an educational video by 42 Degrees North Media for the National Institute on Deafness and Other Communication Disorders, the sense of smell alerts people to potential dangers such as gas leaks, spoiled food, or fires.
The video also explains why a person’s sense of smell may change over time and how these changes can affect quality of life.