In horror films, characters see dead people. A German shepherd dog named Solo smells them.
Science professor Cat Warren (yes that's her real name), discovered Solo's unusual talent as a cadaver dog when searching for an outlet for his energy and determination as a puppy.
Dogs are used to sniff out bombs, drugs and track suspects. Professor Warren looks at the science and training that goes into these canine/human partnerships in her book, What The Dog Knows: Scent, Science, and the Amazing Ways Dogs Perceive the World.