Well an asteroid impact could happen in 2012 but it is not written in the bible. The socalled Bible Code is a method whereby one can find almost any message in a text of a certain size. See more here: The Bible Code or here: Scientific Refutation of the Bible Codes
.
In the last link you can also read about famous assasinations and Princess Diana in Moby Dick. Michael Drosnin's own murder is also "predicted" in Moby Dick