you college basketball fans might be interested in knowing that in order to be sure to fill out a march madness bracket exactly right, you would have to fill out over 18,000,000,000,000,000,000 brackets. that's 18 quintillion, if you were wondering. And that means that even if every single person on the face of the planet filled out a unique bracket, chances of someone getting it exactly right are still pretty much impossible. i tried sharing this with my seventh graders this afternoon. they were unimpressed and disinterested.