One morning, a tiny snowman appears, seated on a bench near the corner of 112th Street and Broadway in New York City, a couple of blocks from Columbia University’s Earth Institute. Someone must have picked up some of last night’s snow and decided to do something nice with it. It’s cold today—low of 20 degrees F, way below average for this time of year. Climate change … pooh! A good day to be snowman! Let’s take a picture every time we go by. Maybe we will learn something.