“In a crosswalk at rush hour, you thread your way through the oncoming crowd, your eyes passing over the faces before you. This wayfinding might feel like something you’re doing on your own. But scientists who study the movements of crowds have found that a simple trip through a crowd is much more like a dance we perform with those around us.” But if you’re looking at your phone during that dance, you end up turning the waltz into a box step. NYT: If You Look at Your Phone While Walking, You’re an Agent of Chaos.