You've heard it...seen it on TV...watched it in the movies. I personally never really been to concerned..it's happened over and over throughout the years. I guess it's usually the younger generation that falls for these things.
After all the talk about NASA, I went to the site just to look at what they had and ran across this link. Interesting read none the less
Here is their link to the end of the world..
http://www.nasa.gov/topics/earth/features/2012.html