It is from the predictions of ancient Aztecs and even that of Nostradamus where Earth will eventually meet its final end. Scientifically speaking, the Earth is already an old planet and base from the global problems that tremendously affect our environment, people are now facing Harbinger's effect and Environmental backlash where those phenomena gave us warning signs that the Earth is in a worse condition as compared from the previous million years ago. But as for me, I don't believe that the world will end at 2012. In its religious aspect, only God knows when He will wash the Earth once more or perhaps, end humanity and the like.