Artificial intelligence (AI) has landed on Earth like an alien spacecraft from a science fiction novel. We now have self-driving cars; computers that can diagnose illnesses, recommend treatments, and predict and solve crimes; smart phones that can route us from point A to point B; gadgets that can understand and respond to spoken commands; and much more. All of this is made possible by machine learning (ML). Although AI and ML can be used to help us answer questions and solve problems, for many of us they create more questions than answers, questions such as “What is intelligence?” “How do machines learn?” “What is a machine learning algorithm, and how does it work?” “Will machines take my job?” “Will they take over the world?” and, for those in business, “What do I need to know about AI and ML to harness its power?”