The 2012 doomsday prediction is a present-day cultural meme proposing that cataclysmic and apocalyptic events will occur in the year 2012. This idea has been disseminated by numerous books, Internet sites and by TV documentaries. The forecast is based primarily on what is claimed to be the end-date of the Mesoamerican Long Count calendar, which is presented as lasting 5,125 years and as terminating on December 21 or 23, 2012, along with interpretations of assorted legends, scriptures, numerological constructions and prophecies.
A New Age interpretation of this transition posits that, during this time, the planet and its inhabitants may undergo a positive physical or spiritual transformation rather than an armageddon, and that 2012 may mark the beginning of a newer sociopolitical age for the global community.Various ideas have been advanced concerning a possible end of the world in 2012. One idea involves a geomagnetic reversal (often incorrectly referred to as a polar shift by proponents of this theory), which could be triggered by a massive solar flare, one with energy equal to 100 million atomic bombs.This is supported by evidence that the Earth's magnetic field is weakening, which indicates an impending reversal of the north and south magnetic poles. Scientists believe the Earth is overdue for a geomagnetic reversal, and has been for a long time, even since the time of the Mayans, because the last reversal was 780,000 years ago. Critics, however, claim geomagnetic reversals take up to 5,000 years to complete, and do not start on any particular date. Also, while NASA expects a particularly strong solar maximum sometime between 2010 and 2012, there is no scientific evidence linking a solar maximum to a geomagnetic reversal. A solar maximum would be mostly notable for its effects on satellite and cellular phone communications.
Another apocalyptic idea circulating about 2012, which has existed in various forms since 1995 and has changed dates at least twice since then, is that a large planet, called Nibiru, will collide with or pass by Earth in that year. This idea has been ridiculed by astronomers, who point out that such an object so close to Earth would be visible to anyone looking up at the night sky.From: Wikipedia
