Minting coins isn't exactly an exact science. Even though most coins are perfect and uniform, small mistakes can result in error coins that are super valuable and ...

You might have walked past a fortune today without even realizing it. That loose change rattling around in your pocket, the handful of quarters you tossed into a jar, or the pennies you almost left on ...

Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime steel ...