Dogs might be man's best friend, but how much do you really know about your pup? It's estimated that a third of all households around the world have a dog, and they've been by our sides for thousands of years. But regardless of how close you are to your four-legged partner, there are likely some fascinating facts about your dog that you still don't know.
From their unique noses to their internal GPS systems, click on to be further amazed by your canine companion.