On a trip to Rome while sitting on a hill overlooking the Colosseum I began to contemplate the people who had walked on the ground below throughout history. It would read like the who's who of Roman History. This led me to consider the passage of time and the idea of footprints in time and space. Everywhere you travel has a long history, hidden by time. It’s fascinating to think about how the past has shaped the present and how our actions today will shape the future.