Why is the earth round?

Our Earth is round, because massive bodies always tend to take the shape of a ball. But the Earth is not really a ball. The surface of our planet is very uneven, because there are high mountains (for example, Everest) and quite deep depressions (for example, the Mariana Trench) on it. So, if we speak in scientific language, then it has the shape of an ellipsoid. But he is not quite ordinary, but cardioidal.



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