The Wisconsin state quarter features a cow, cheese, and an ear of corn. One version of this quarter gives the corn an extra leaf low on the ear. This may have happened when a tool was pushed into the ...

You might be sitting on a coin collection that's quietly losing potential worth while you read this. The 50-State Quarter program captured American hearts from 1999 to 2008, with roughly half the ...

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 ...