Water, water, everywhere...but how much of it can we drink?  In this episode, Chelsea and Melissa chat with Dr. Mark Locicero about Roman drainage systems in the ancient North African town of Volubilis (modern Morocco) and the Italian port city of Ostia. Find out how ancient Mediterranean people controlled and accessed clean drinking water and how that differed based on status, class, and location. In this episode we explore issues that are still very relevant to our lives today, including global water shortages, waste, and inequality, through a discussion about how archaeologists interpret the "invisible footprint" of ancient water.