How a Dog Nose
Although underrated, humans have an amazing ability to detect various smells. What animal has the best ability to do this? It depends on how it is measured. Elephants can distinguish the greatest variety of smells, and some other animals may also rate highly. But they have not yet been tested.
Dogs are legendary as trackers of fugitives and missing persons, and their sooper sniffers have been utilized to sniff out cadavers, bombs, drugs, cancer, and even fossils. Now things are getting even more interesting.
Labrador nose, Freeimages / huzzah |
According to Professors Stuart Burgess and Andy McIntosh: “The area in a dog’s nose with scent receptors is more than ten times larger than the equivalent area in humans. A dog also has up to a hundred times more receptors per square centimetre. … The part of the brain that processes smells is forty times larger in a dog than in humans …”.This is of particular importance for wild dogs (see ‘Smell in the wild’ below) to hunt down their prey. Without their much-needed noses, they wouldn’t be able to sense the world around them nearly as well.
You can read the entire article by digging up "How does your dog smell?"