Explosive advances in artificial intelligence have made it possible to accurately forecast what is to come. It's already being used to forecast the weather, and to anticipate crime. Doctors are turning to AI to calculate the potential for diseases such as Alzheimer's, and it's even playing a role in life-or-death medical decisions. AI's unparalleled predictive powers come with both benefits and risks. We take a look at its growing impact on society and people's lives.