The reason why some countries appear larger or smaller than others is due to something called the Mercator projection. Putting a 3D planet on a two-dimensional world map was a challenge for the early cartographers. So for better navigation the globe was projected on a grid of perpendicular parallels and meridians. But since the real area between two meridians is decreasing near the poles, the projection is distorted, because on the map the distances are equal.
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