- the end of the Mayan long calendar, which will begin its thirteenth cycle on 22 December 2012.
- Nibiru or Planet X, which is not headed to impact with Earth on 21 December 2012.
- gravity destroying Earth due to the Sun crossing the plane of the Milky Way.
- gravity destroying Earth due to an alignment of other planets.
- solar storms destroying the Earth.
- destruction of the Earth by the flipping of the magnetic poles.
- impact by a significant asteroid.
21 December 2011, Original Pedantic Political Ponderings post.
13 March 2012, FollowUp 2.