(CNN) – A block of the world’s second official postage stamp is going up for auction in May. It is expected to fetch millions ...

The greatest stamp discovery in modern history is expected to bring $5m to $7.5m We all dream of opening an old book or ...

Widely regarded as the most famous and influential boxer of all time, Ali is being honored for the first time with a commemorative U.S. postage stamp.

Block of the world's second postage stamp goes up for auction in May; expected to fetch up to $7.5M.

Muhammad Ali once joked that he should be a postage stamp because “that’s the only way I’ll ever get licked.” Now, the three-time heavyweight champion’s quip is becoming reality. Widely regarded as ...