What a dog's nose knows

Ever wondered how a dog, with a sense of smell that may be thousands of times more sensitive than ours, can bear to bury its face in the trash can? Alexandra Horowitz, a dog-cognition researcher at Columbia University in New York City and author of Inside of a Dog: What dogs see, smell, and know, says it's because the dog isn't simply smelling a stronger version of the revolting mono-stench that we smell. "It is not that smells are 'louder'," she says. "The smells have different layers, which probably give dogs a much bigger range of types of information."
via New Scientist /continue reading