You probably don't think twice about the crumpled dollar bills sitting in your wallet. They're just money, right? Here's the ...

If you’ve ever read the eight-digit serial number on a dollar bill, it was probably to play liar’s poker—or out of sheer boredom. But those digits are more than a passing diversion to a thriving ...

Calvin Westfall, a 59-year-old vending machine owner from West Virginia, made a surprising discovery recently while sorting through the cash from one of his machines. Among the familiar stack of ...