On paper, it didn't look like Week 12 of the college football season was shaping up to be all that exciting. There were just three games pitting BCS Top 25 teams against each other, and many of the top-ranked teams in the nation were facing weak opponents.
As it turned out, though, the 12th Saturday of the 2012 season was actually the wildest and most tumultuous day thus far. Upset losses by the two top-ranked teams in the country, Kansas State and Oregon, have added a huge twist to the BCS-championship race and thrown the college-football world into a state of chaos.
There are many key storylines that developed and there's a lot of action to analyze. Here's a look at the important lessons we learned from Week 12.