You could always count how many laps you ran on the track. But now you know how many steps you took, how many calories you burned, what your bowels were doing at the time, and whether or not that pasta you ate is really helping. With the right apps and gadgets, there's nothing you can't track about yourself. But what happens when our lives become a series of numbers and charts?

This is Top Shelf. Join David Pierce and friends as they look inside the "quantified self" phenomenon, and try to figure out who will be the Google of our bowel movements.