It’s clear that genes, receptors and neurons all play a role in detecting odors. But much of how we make sense of what we sniff remains mysterious. A neuroscientist explains. By Daniela Hirschfeld / ...

We rarely think about it, but the sense of smell gives us a remarkable power. Without moving or even opening our eyes, it allows us to detect danger, trigger memories, and enjoy the aroma of food.

For the first time, researchers have determined how a human olfactory receptor captures an airborne scent molecule, the pivotal chemical event that triggers our sense of smell. Whether it evokes roses ...