My poor kids. My son Murphy, a computer scientist, was talking last week about a system for archiving mathematics research on the web. "The problem is that a lot of the important papers are by people who are really old now," he said. Uh oh. The problem, I promptly pointed out, isn't age but technological illiteracy. While older scientists were indeed less likely to race to post their work online, it was wrong to assume so on the basis of age alone. He got it, with his characteristic sweet smile, though he probably felt more like kicking me.