A dog's sense of smell is even more advanced than we realized

I have a cute dog that's something of a beagle mix, and as tends to be the case with canines from the hound family, he's essentially a nose with four legs. If he picks up the faintest scent of food, no matter the time of day, he makes a beeline for the source in the hopes that he might get a meal, or at the very least, a few scraps. Walking him, as you might imagine, is also something of an adventure. With his nose practically glued to the ground and leading the way, he'll take his sweet old tim...