In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|Why Jon Stewart quit 'The Daily Show:' Increasing 'dissatisfaction'|
|I told a dude how much I made. It changed my life|
|Stocks: Big check-up this week from corporate earnings|
|The U.S. economy isn't growing fast enough|
|Walmart fired 2,200 to fix the plumbing|