From a visual point of view, dogs may be classified as “color-blind”. But for dogs themselves, their world is still much more gorgeous than ours – because they also have a fairly developed olfactory system. In the short video below, Barnard psychology professor Alexandra Horowitz explains how dogs perceive the world through their noses. I believe you will feel incredible after watching it.
In terms of distance, dogs have a more “three-dimensional” sense of smell, which means that their two nostrils can independently perceive the type and source of smells.
In addition, they allow air to flow in from one nostril and out from another, sorting odor information through hundreds of millions of olfactory perception units along the way.
These sensory units then send huge amounts of information to the olfactory bulb part of the brain, which is apparently much larger in dogs than in humans.
