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.
|First U.S. penny sold for $1.2 million|
|Lufthansa will now keep two crew members in cockpits|
|More than half of middle-class kids fail to earn bachelor's degrees|
|Samsung Galaxy S6: An iPhone for people who hate Apple|
|Mercedes-Benz to make a pickup truck|