What are your thoughts on this topic?
Many people are discussing 2012 as the end of the world due to interpretations of predictions contained in the Mayan calendar. The Mayan civilization was extremely advanced in mathematics, engineering and astronomy. They also had an incredible understanding of time and space. Various calendars were in use to track time in linear progressions within cycles. The “Great Cycle” of the “Long Count” calendar equates to 5,125.36 years. The current Great Cycle is due to be completed on the winter solstice of 2012, December 21. So, it has been interpreted that on this day, the Great Cycle ends, time ends, so the Earth must end as well. However, there are different opinions on what this end date really means.
As mentioned, some believe cataclysmic events will take place in 2012 with the ultimate destruction occurring on December 21, 2012. Others believe that the world will not end, but instead humanity will enter a new age, marked by significant changes physically and mentally.
(copied from http://www.2012endofdays.org/general/why-2012.php)