The primary reason for belief in PlanetX are unexplained variances in the orbits of the outer planets. Should there actually be a large body, outside the orbit of Pluto, it will have no effect on the current geology of Earth.
If the government knew of this planet, they would have no logical reason to hide it. The planet would be dead biologically, and likely quiet geologically as well due to the lack of solar radiation, and the frigid temperatures this entails.
Outside the orbit of Pluto, we enter into the Oort cloud. this enormous group of comets and asteroids stretches millions of miles beyond Pluto, and would make a full blown planet virtually impossible in this area. Beyond the Oort cloud.....Who knows.
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Holding onto anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned. - Buddha
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