When we took our eldest son to college this weekend, I noticed something new in the heart of campus, painted on the sidewalk at each roadway intersection: Heads Up Phones Down In other words, kids, pay attention to the here and now. (And don't get run over.) Students entranced by their devices apparently have had some close calls, necessitating the stenciled letters on the sidewalks. … [Read more...] about Heads Up, Phones Down: A Rule for Life in the 21st Century