It has been the subject of countless books, films, and TV specials for years and, now, for better or for worse, 2012 has arrived. The new year brings with it fervent speculation as to what will happen when the Mayan Calendar ends on December 21st as well as the usual annual hopes that this will finally be the year that UFO truth is disclosed, Bigfoot is proven to be real, or the Cubs win the World Series. CNN offers photos and videos of the global celebration unfolding as 2012 leaves the realm of science fiction and moves into reality.