Developing our sense of smell

When our noses pick up a scent, whether the aroma of a sweet rose or the sweat of a stranger at the gym, two types of sensory neurons are at work in sensing that odor or pheromone.

http://www.sciencedaily.com/releases/2013/03/130325160625.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily%2Fmind_brain%2Fneuroscience+%28ScienceDaily%3A+Mind+%26+Brain+News+--+Neuroscience%29