Think of the world map. The one from school, from atlases, the one Google shows you by default. Greenland sits up top, a massive white slab roughly the size of Africa.

Greenland is not roughly the size of Africa. Africa is about fourteen times larger. The map you've seen your whole life has been wrong about this since 1569, but we just go with it.

In 1569, a Flemish cartographer named Gerardus Mercator was trying to solve a difficult problem.

How do you flatten a round planet onto a rectangle so sailors can navigate by it?

Mercator built his map so that a straight line drawn on it equals a constant compass bearing in the real world. For a sailor, this is gold. Draw a line from port to port, read the angle, hold that heading, and you arrive.

But you cannot flatten a sphere without distorting something. To keep those angles perfect, Mercator had to stretch the map horizontally as it moved away from the equator, and stretch it more and more the farther north or south you went.

The Earth narrows toward the poles, all the lines of longitude squeezing together until they meet at the top and bottom.

A flat rectangular map can’t easily show that interaction at the poles. It holds those longitude lines perfectly parallel from bottom to top. So to fill the space, the projection has to inflate everything near the poles, stretching those regions wider and wider to fit a rectangle. The distortion is nearly zero at the equator and grows toward infinity at the poles.

Which means the farther a place is from the equator, the more bloated it looks. Greenland, way up near the Arctic, becomes the single most exaggerated landmass on Earth. Canada, Russia, and Scandinavia all swell, too. Antarctica smears into a continent that looks bigger than all the others combined, when it's actually smaller than Russia.

The Mercator map puffs up the northern latitudes, Europe, North America, Russia, and diminishes the equatorial regions of Africa, South America, and Southeast Asia.

The wealthy, historically imperial nations look larger and more central than they are, while the equatorial world looks smaller than it is.

None of that was Mercator's intent. He was solving a sailing problem, but the map became the default picture of the planet anyway, hanging on classroom walls for centuries and shaping how billions of people picture the relative size and importance of the world's regions.

It's enough of a real issue that in August 2025, the African Union formally backed a push to retire the Mercator map from official use, on the grounds that a continent fourteen times the size of Greenland should not appear to be its equal.

There's no perfect fix, because flattening a globe always breaks something, whether it's size, shape, or distance. Every flat map is a compromise, and the only fully honest map of Earth is a globe.

But it's worth knowing that the most familiar image of our world was never built to be true. It was built to be useful for one specific job five centuries ago, and we've been mistaking it for reality ever since.

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PS — The AuthaGraph is supposedly the most accurate representation of the world, but it just looks so weird.