Bob Berman's strange universe: End of the world: 2012
December 2007: Every few years, a crackopt comes forward with a new "Armageddon from space" theory.
Every few years, a crackpot comes forward with a new "Armageddon from space" theory to scare those who performed poorly on the SATs. The current version has the doomsday clock ticking down toward the 2012 winter solstice 5 years from now. Because this prediction has already spawned more than 100 books, astronomers might want to know enough about it to answer any questions.