In the FAQ, it is posed that all other celestial bodies are round, however the earth is not. This cannot be true, as according to the basic cosmological principle, the universe is homogeneous and isotropic, or in layman's terms, the universe is composed in the same way everywhere and all laws of physics apply everywhere. Therefore either the earth is round, or the other bodies are all flat.
The history of the universe and common sense provides that as matter cooled from the big bang expansion, it would lose energy and begins to coagulate into celestial bodies in several distinct generations. First came hydrogen and helium stars, which degenerated to heavier elements via fusion, and from there came carbon, oxygen, and nitrogen which make up the earth. Assuming everyone here believes the earth we occupy is a part of the same universe that the celestial bodies mentioned in the FAQ, it must be spherical in the same manner as the stars and other planets.
quod erat demonstrandum
or for cretins: "that which was to have been demonstrated"