i just find the whole "end of the world" thing intriguing. i don't know of any "evidence", but i know that the Mayan calendar marks doomsday as 12/21/2012, and i believe there is another culture or whatever that believes it as well.
on a funny note, whenever something important comes up, i always joke that it's not that big, because we'll all be dead in five years anyway. my wife doesn't like me talking like that, so i say it more.