Measuring Poop: Weirdest Thing Tim Ferriss Ever Tracked<br />WIRED - Le Parker Meridien<br />Tim Ferriss, author The 4-Hour Workweek and The 4-Hour Body, discusses how he tracks his life's data in the 4-hour everything.TIM FERRISS<br />Author/Guinea Pig, The 4-Hour Workweek and The 4-Hour Bodyin conversation with CLIVE THOMPSON