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Mayan Calendar, 2012

The Mayan calendar marks Dec. 21, 2012 as the end of a Great Cycle.

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The 2009 movie, "2012," is a 158-minute showcase of apocalyptic eye candy, with enough death and destruction to bring up the question, "What's so bad about 2012?" It depends on who you ask. The fear is based on the way some people interpret the Mayan Long Count calendar, which is divided into Great Cycles lasting approximately 5,125 years. One of these cycles ends on Dec. 21, 2012, giving some doomsdayers the ammunition they need to declare the impending apocalypse. They also have numerous theories about how exactly the world will end. Some claim that a mysterious planet known as Nibiru, Planet X or Eris, or a large meteor, will collide with Earth. Another popular theory is that the Earth's magnetic poles will reverse, causing the planet's rotation to reverse as well.

Scientists have already dismissed these theories as laughable. They contend that if a celestial body were on a crash course with Earth, they would have already noticed it. And while astronomers recognize that the magnetic poles do reverse every 400,000 years or so, they insist that this event does not affect the Earth's rotation and will not harm life on Earth. Perhaps the most interesting part of this whole apocalyptic fad is that the Mayans themselves don't expect that the world will end in 2012, rather, they expect it to be a time of great celebration and luck when the planet completes the current Great Cycle.

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