Listen now (8 mins) | Imagine travelling alone in a car and getting lost on a deserted road. As you approach a crossroad, you have no idea where to go. What will you do in such a situation? Well, today, the answer is pretty simple: Global Positioning System (GPS). But a few decades back, things were not that easy. So come, let's delve into the history behind this invention that revolutionised travel on this planet.