The human sense of smell is really complex! It’s not just your nose: it is actually a combination of your brain and your nose cells working together. It all starts with air. The air has a lot of smell molecules floating in it. When the air enters your nose, the different molecules activate special smell sensor cells in your nose and sends the information to the brain. The part of the brain that receives the signals is called the Olfactory Cortex. The Olfactory Cortex decodes that information and tells you what you are smelling! Listen to the Spectacular Science episode about smell with Dr. Rachel Herz here!