Polar shift: This is ridiculous, it takes an extremely long time for the poles to switch, and this won�t happen on 2012. Even if it did, this wouldn�t threaten our way of living in any way.
Finally, there has been a recent rumor about this Planet X. Whenever I hear about this so called �brown dwarf�, I sigh and roll my eyes. Let�s say, hypothetically, there WAS indeed an enormous asteroid headed toward us. If this were true, scientists would�ve been able to track it long before now. Also, we would be able to see this �killer meteor� with the ***** eye, and, as far as I know, the only pinpoint of light in the sky that noticeably moves is the ISS, or the International Space Station. Planet X, Nibiru, is nothing to worry about.
As many other scientists say, �On December 20, 2012, I�m not going to be stocking up on food. I�m not going to be stocking up on water, or ***ger counters, or medicine. The only thing I�m going to stock up on is some extra Eggnog for the upcoming holiday.�
In other words, there is no reason to freak out. Nothing is going to happen in 2012!
EDIT
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I've seen other people talking about a meteor some time in 2029. The truth is, this meteor is called "Apophis." This is a real asteroid that is expected to make a close encounter with the Earth, but the risk was downgraded to 0 on the Torino Impact Scale. However, there is a very small chance that the meteor will pass through a keyhole near the Earth, redirecting it at us for another encounter in 2036. This, however, is so unlikely, that this was also downgraded to a 0 on the Torino Impact Scale