Just a little on how smell and hearing works to give you an insight into how it's all electrical signals: Smell is our most sensitive sense and the one most strongly linked to our memory and feelings. Our olfactory bulb, which begins inside the nose and runs along the bottom of the brain, is the first stop for new smells. This bulb is directly linked to two areas of the brain that govern emotion and memory: the amygdala and hippocampus. When an odorant stimulates the chemoreceptors in the nose t