Nürnberg - Many swear by rubbing a coin against metal or fabric if a vending machine doesn't accept it. But does that actually help? And how does a vending machine determine whether to accept a coin ...

Explore the coin system inside a vending machine. Learn about the coin levels for nickels, dimes, and quarters, and what happens to the money collected in the machine. Why Congress can't claw back war ...

Japan has so many vending machines that they hardly register in the minds of most people walking down the street. However, an array of vending machines in Tokyo’s Kamata neighborhood has been catching ...