Arend HintzeMichigan State University Should We Fear the Rise of Intelligent Robots? Opinion A scientist who spends his days developing artificial intelligence systems, reveals what about AI keeps him up at night. Opinion From Reactive Robots to Sentient Machines: The 4 Types of AI We need to do more than teach machines to learn. We need to overcome the barriers that separate machines from us – and us from them. By Arend Hintze Published 14 November 16