Column

Editorial: Time to Think about Artificial Intelligence. "AI pervades our world and may soon start evolving faster than humans can track it--in whose hands should this awesome power reside? When it comes to emerging technologies, we know what we're afraid of, even though we may not know why. There is no shortage of public debate about genetically modified crops, nanotechnology and cloning. And policy makers have responded: many countries have laws that restrict the way these technologies can be used.