What is the difference between choking and panicking? Why are there dozens of varieties of mustard but only one variety of ketchup? What do football players teach us about how to hire teachers? What does hair dye tell us about the history of the 20th century? In the past decade, Malcolm Gladwell has written three books that have radically changed how we understand our world and ourselves. In What the Dog Saw, he brings together the best of his writing from The New Yorker over the same period.