Many people say that our smartphones are making us stupid. Well, it turns out that the internet actually helps us expand our knowledge. Peter Norvig, the author of, “Is Google Making Us Stupid?” explains how this might be. “Suppose I'm interested in the guidance computers on Apollo spacecraft in the 1960s,” he writes. “My local library has no books on that specific subject, just 18 books about the Apollo missions in general. I could hunt through those or turn to