Dogs have a remarkable ability to discern and remember scents,
far superior to that of a human. A dog's sense of smell may be
as much as 100 times better than ours, making it the most
sensitive and vulnerable part of its body. The human nose has
only three-square centimeters of olfactory membrane where some
dog breeds, such as Bloodhounds, have as much as 150 square
centimeters of scent-sensing material in their noses. Dogs also
have forty times more scent processing cells in their brains
than humans. Another factor for the dog's superior smelling
ability is its ability to collect air in a special chamber of
their nose. The air stays in the chamber when the dog exhales,
so scent molecules accumulate there until there is a sufficient
concentration available for the dog to identify an odor. Besides
being able to discriminate between different smells, a dog has a
phenomenal olfactory memory. A dog can remember smells long
after being exposed to the original odor. Not only can your dog
recognize that a certain ne