The US government had urged NASA to deny the existence of Nibiru in order to not cause widespread panic throughout the world.
Nibiru is 6500 times larger than the earth!
Nibiru is a Mini Solar System (carries along with it seven planets)
Nibiru is Sumerian for 12th Planet
If it pass close enough to Earth, it influent our oceans, eventually leading to devastating tsunamis, a new awaking of volcanoes around the world and influenced definitively the climate and the earth's axis which slowly moves, thus altering the position of the physical and magnetic poles.