Airplane routes often appear curved rather than straight when viewed on a map. This observation may seem puzzling at first, but the reason lies in the very nature of our planet's shape and the principles of geometry used to optimize air travel. The Earth's Shape: A Sphere, Not a Plane The Earth is not flat; it’s a three-dimensional sphere. While a straight line is the … [Read more...] about Why Are Airplane Routes Curved Instead of Straight?