Among the things we take for granted in today’s America is knowing the time …which makes transportation, business and national events possible. This, however, was not always the case. Today, from building sewers to standardizing time, we’ll talk about the invisible innovations that got us where we are today. Then, more than 30,000 African elephants are poached every year, mostly out of East Africa. In an effort to understand the illegal ivory trade, a journalist commissioned a tusk made of fake ivory with a GPS tracker inside. We speak with the man behind that tusk.