Our planet rotates on a wedge leaf. Globe-it would seem that it could be easier? Due to natural reasons, the matter that served as the building blocks of our planet, gathered in a clump and gradually formed a correct sphere, and the bumps came later as a result of tectonic processes. But in the name of the form of our planet lies a mistake. Even if you dig all the hills and cover all the lowlands, the Earth will not be a ball. Geographers and astronomers have come up with how to call the flattened at the poles ball – geoid.