Our world is full of mysteries. They begin with the very creation of life (the Big Bang Theory for example) and continue right up to the present. Today, one of the largest group of mysteries, consists of who-dunnits, also known as murder mysteries. With a current worldwide population of 7 billion (and still growing) the ways that one human can kill another has grown at a staggering rate. This is good news for mystery writers, but bad news if you happen to be that unlucky soul who gets at axe embedded in your skull. Pictured above is one little mystery that surrounds an old house. The drawing was originally created for a short story, but this piece of artwork also works well this weeks Illustration Friday topic.