Dogs have 50 times the amount of smell receptors that humans do, and the part of their brain that deals with smell information, the olfactory bulb, is 40 times bigger than ours.

Smelling is part of a dog’s natural behavior, both to survive, and to make sense of their world. They smell everything and everyone they encounter. If a human behaved similarly, they would be viewed with suspicion and possibly locked up!

Have you ever noticed that dog noses have little slits at the sides? This is so they can exchange and mix fresh air with exhaled air. It enables them to sniff for longer, and the smells are amplified and enhanced.

Read the full story at https://hound101.com/can-dogs-smell-cancer-how-dogs-are-saving-lives/