That's the Aztec calendar. It's supposed to be the most accurate calendar ever made. No leap years, which are needed for our calendar kuz they fill the gap that would throw it off every four years. Which explains why their calendar is round. The Aztecs were also the people that invented the number ZERO. They show some crazy shit on the Discovery Channel about the Aztecs, Mayans, and the Incas every once and a while. Shit on how they used the sun, stars, and planets to design their pyramids. They used to track the eclipses and sacrafice virgins... crazy shit.
Didnt YOu Ever See Ghostbusters, one of the first seens soem dude next to Bill Murray says the world will come to an end in 2012, some hardcore pyschic, I dont doubt it, one of them talibans gets a Nuke and where all done for, thats real
That articule didn't go to into depth about why some say the world may end. But more into the logic mayanamericans used to determine the end of "the great cycle." The theory itself is that there is a "dark rift" or road located withing the milky way & upon 12/21/12 our planet & another star will be perfectly aligned with the galatic equator, on a winter solstice thus creating a void that will allow us/or force us to travel down the dark rift into either the underworld (hell) or heart of the sky (heaven).
Ain't a damn thing gonna happen, just like that bull shit from that old show "Sightings" they had an "elite panel of psychics" who all predicted that California would sink and the world would end on May 19th 1999...