How does your phone know where you are?

That little blue dot on your map feels like magic. Your phone, with no visible connection to anything, can instantly pinpoint your exact position on a planet of 510 million square kilometers. In our premiere episode, we pull back the curtain on the incredible system that makes it all possible: the Global Positioning System (GPS).

Join us as we journey from the constellation of satellites orbiting high above Earth to the tiny receiver in your pocket. You'll learn about the mind-boggling precision of atomic clocks, how your phone plays a game of catch with radio signals, and the clever math (called trilateration) that turns those signals into a precise location. By the end, you'll never look at that blue dot the same way again.