The map in your head is lying to you

The world map most of us carry in our heads is the Mercator projection, drawn in 1569. It wasn't designed to teach geography but to navigate: it turned constant-bearing routes into straight lines, which was priceless with a compass in hand.

The cost of that trick is enormous. To preserve angles, Mercator stretches the planet near the poles. The result: Greenland looks like a continent when it would fit into Africa about fourteen times. Alaska appears larger than Mexico, though Mexico covers more ground. Europe and North America come out inflated; Africa and South America, shrunken.

There's no conspiracy: flattening a sphere always forces you to distort something. But it's worth remembering, because maps don't just describe the world. Quietly, they also rank how much of it we think matters.