What a nose a bloodhound has! Bloodhounds can pick up a scent that is 12 days old. That would be like still smelling the perfume from someone who walked past you 12 days earlier. This dog can detect a scent trail of only a few molecules of a given scent. Let’s sniff out how a bloodhound can do this.Once a molecule of scent is picked up in the large nasal chamber of the dog, which has 3...
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