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

Each modern U.S. dollar bill is designed to be unique, a feature ensured by a distinctive serial number. This identifier, comprising ten or eleven digits, is not a random sequence. Each letter and ...

Natasha Bedingfield might have had a pocket full of sunshine, but there’s a chance you’ve got a pocket full of rare $1 bills worth a lot of money. From notable mistakes to the uncirculated, ...