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Message: <blockquote data-quote="Gez" data-source="post: 1820783" data-attributes="member: 1328">Yes, but 5M well-trained receptors (and more importantly, a brain trained to interpret to the full extent the information from those 5M receptors) can probably match up 200M barely used receptors.I know some dogs are trained so well they can, from your mere smell, determine whether or not you have some sort of cancer. Specially-trained dogs are also used, as everyone knows, to detect drug, explosives, or people burried under snow or debris.The key here is specially-trained. My pet dogs would not be able to find someone burried under snow. Heck, the poor bitch (yep, she's a she-dog) is barely able to tell whether someone is in the same room as her by scent.A specially-trained human is probably able to perceive odors as well as a non-trained pet dog. Now he will never be match to a bloodhound or any other sort of dog trained to use scent. That goes without saying. But outpassing the basic lazy pet dog that never had to hunt or scavenge for food, is not used for hunting, and wasn't even trained to sit up and beg? Yes, definitely.</blockquote>