From the worlds of finance and the stock market to transport and the healthcare industry, artificial intelligence is rapidly taking over jobs from human beings. Machines don't need to eat or sleep, and are not prone to human error. Indeed, A.I. is quickly taking center stage in all aspects of our lives, from the transport we use to get around, to visiting robot doctors to make us better. But what risks does A.I. pose to human jobs, safety, and, importantly, our very existence?