This is one conspricarcy which I am not completely looking forward to, but The Mayans have predicted a lot of things which have come true. The things predicted by the Mayans, which have come true is The First World War, the rise of Hitler, The Boxing Day Tsunami, the death of its own culture and people and believe it or not Space Flight too.
What I personally believe in is this, a massive asteroid will hit the Earth and it will wipe out over a third of the population of this planet, but there will be survivors. In some cases, this could be a like some form of Cosmic Cleanup.
Anyway here are some links on this Conspricarcy which is going to be discussed a lot in the year of 2012.
http://www.endoftheworld2012.net/mayancalendar2012.htmhttp://www.mayanpredictions.net/