The Electronic Dog Nose

The eyes are the window to the soul,
but the nose is the window to the hole.

A new miniature device is said to be inspired by the canine nose, and can sniff out any programmed airborne chemical to the parts per billion level.  The folks at SpectraFluidics, who made the mechanical dog nose see it being used for not just explosive detection, but also for disease diagnosis, narcotics detection, and even spotting spoiled food.