Yuggoth Update: A new Planet "X" Uncovered?

A computer simulation has shown that our solar system couldn't have formed without an extra planet. But if that theory is true, what happened to it?

Yuggoth Article

David Nesvorny from Colorado’s Southwest Research Institute reached the conclusion after performing around 6,000 computer simulations about the formation of the solar system, nearly all of which required the extra planet .. The computer simulations also explain the fifth planet's fate ... the five gas giants begin tightly wound together. But soon the lighter planets of Neptune and Uranus get pushed into a further orbit by Jupiter and Saturn, and the fifth planet gets ejected from the solar system ... somewhere out there, there may still be a solo gas giant ... floating aimlessly through space.