5 Cool Facts About a Dog’s Sense of Smell
“There are many ways to categorize sense of smell, but one way is to test an animal’s threshold, which can be different for different odors. A dog nose can detect an odor in parts per billion, while humans may only be able to detect the same odor in parts per million. It’s like if you were to put just a drop of the odor in a swimming pool. Dogs can pick up very small concentrations of certain scents,” says Nathaniel Hall, director of the Canine Olfaction Research and Education Laboratory at Texas Tech University. ,


