** The Coastline Paradox: A Mathematical Conundrum That Challenges Our Understanding of Coastlines

The length of a coastline is a seemingly simple concept, but it turns out to be surprisingly complex. Measuring coastlines has become a contentious issue among experts due to the "coastline paradox." This phenomenon occurs because coastlines are not straight lines and have many features like bays, inlets, rocks, and islands that make them difficult to measure definitively.

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Source: https://www.livescience.com/planet-earth/whats-the-coastline-paradox