Lost Books of Nostradamus: on Dec 21 2012 we will be in the constellation Ophiuchus the 13th sign of the zodiac. It is known as the unlucky sign. At that very same time Sagittarius will be pointing his arrow directly at the galactic center, also known as the Leviathan or Dark Rift. And of course we will be passing through it as well.
Strangely the last known Pole Shift was roughly 11,500 years ago and passing through the Dark Rift is roughly a 13,000 years cycle, again ending 2012.