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

Widely regarded as the most famous and influential boxer of all time, and a cultural force who fused athletic brilliance with political conviction and showmanship, Ali is being honored for the first ...

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

The postage stamp that started it all is going under the gavel. The coveted 18th-century rarity, known as the Penny Black, was the world’s first postage stamp and represents the very dawn of social ...

Many collectors today wonder if postage stamps are good investments. While some rare and historical stamps have increased in value over the years, the market can be very unpredictable. Factors like ...

The recent sale of a 1-cent Ben Franklin stamp for $4.4 million, the most expensive U.S. stamp ever sold, again raises for consideration the question, “Are postage stamps good investments?” Certainly ...

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 ...