Until recently, studies of how babies learned to walk had their subjects move along straight paths over uniform ground – you know, exactly like none of the environments in which actual babies actually learn to walk. But researchers at NYU had the genius idea to study them in mocked up nurseries and playrooms, where they tracked 12-to-19-month olds as they stumbled up, over and around obstacles to discover some interesting averages: 2,368 steps and 17 falls per hour. That’s more than 7-and-a-half football fields, so the short answer to the question of how babies learn to walk is: practice. The longer answer? By discovering how much further and faster they can move than their peers who crawl.