An auction house in New York is marking the United States' 250th birthday by selling items that trace the nation’s history through some of its most iconic documents ...

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

A forgotten coin jar or old travel souvenir might be hiding a surprising financial treasure.

As this last legislative session of the quadrennium moves forward, these four years would have to be rated as an overwhelming success.

The stamps, available for purchase online or in-person at USPS locations, offer a tribute to Ali's multifaceted identity ...

Those first stamps made it easier than ever to communicate, but early on people weren't quite sure how to use them.