Man has leveraged the powerful sense of smell of dogs for thousands of years, but we still are just learning how amazing the canine nose really is. In this incredible video by BBC Earth, search and rescuer Neil demonstrates how astute the nose of his co-worker Fern is. Not only can she perfectly pinpoint the position of their test rescue victim six meters down at the bottom of a lake, but they discover that the target was also buried one meter deep in mud as well. Good dog!