Have you ever wondered how pilots know exactly where to fly, or why your friend on the other side of the world is eating breakfast when you’re going to bed? Our planet is a big, spinning ball covered mostly in water, with land divided into huge chunks we call continents. Figuring out where everything is—and why the clock says different times in different places—starts with some simple but amazing ideas. Let’s dive in and make sense of it all together, like we’re exploring a giant treasure map of Earth!