Besides the fact that the centrifuge forces are stronger at the equator than at the poles, the previous principle also justifies the reason why the diameter of the Planet Earth from pole to pole is smaller than of the diameter at the equator level. The fact is that the Solar energy is much weaker in the North and South poles when compared with the intensity of the Sun at equator level, as a consequence, at the poles, the vegetation and biological activity is less intense than at the equator. So, the accumulation of sedimentation is also lesser than at the equator level. This is the major reason why the Planet Earth, time to time, is obliged to change its rotation, precisely to compensate the “boldness” created at the poles and just to keep the Planet as spherical as possible.

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