The olfactory bulb, which contains glomeruli, is located in the brain’s limbic system, which is often associated with memory and emotions. The olfactory bulb is also linked to the amygdala, which processes emotion, as well as the hippocampus, known for its role in learning. This is why smell is notorious for triggering memories and powerful emotions — and why you may find yourself transported to a different time when you smell chlorine, the inside of an old textbook, or a long-lost lip balm you used as a pre-teen.