This is how I look at it! I watched Episode 1 of the Horizon Project after this then came back to this to see again. This is 3 years of work remember.
So, they claim they have extremely accurate models, accurate enough to predict the interception of the galactic plane in 21/12/2012. Yet I see nothing of this on the web. Some sites say the oscillation period is 30 million years. They claim the Mayans knew and predicted this exact time as well, I think they say the Mayans used the term Dark rift!. The Mayans did this over 5000 years ago apparently, and to within an accuracy of 24 hours. Alright, so if it can be calculated so, then you can calculate it in reverse, and then research what happened LAST TIME IT OCCURRED!! Yet you don't see ANY OF THIS AT ALL! WHY NOT????
There is a lot of evidence to say, more quakes, more cyclones, ocean warming up. Maybe the C02 fluctuation is regular. But that has no relationship to passing through the galactic plane, which is their core premise.
Additionally, the 26000 year period comes from
http://en.wikipedia.org/wiki/Precess..._the_equinoxes and relates to astrological ages. Aquarius may be the end of a 26,000 year cycle since the last Aquarius but what marks Aquarius any different to other zodiac signs and what shows it actually related to 2012? I don't know? Maybe nothing? And what relates the galactic plane to this precission??
http://en.wikipedia.org/wiki/Geomagnetic_reversal talks about the last geomagnetic reversal which is 740,000 years ago apparently too.
dunno, but I just spent a few hours digging at it, If I spent 3 years I'd have a lot to show...