Photo Ark stamps celebrate 50th anniversary of Endangered Species Act - Joel Sartore

nbsp; The next time you drop a letter in the mail you can also send a little piece of the Photo Ark, thanks to the United States Postal Service.   This May when the USPS releases the newest set of Forever Stamps, images from the Photo Ark will be the featured artwork, showcasing some of…

Photo Ark hits a 14,000-species milestone and is featured on a

Endangered Species Commemorative Forever Stamps - Gallery - Joel

Endangered Species Commemorative Forever Stamps - Gallery - Joel

Postal Service Commemorates 50th Anniversary of Endangered Species

Endangered Species Commemorative Forever Stamps - Gallery - Joel

Lincoln-based photographer captures image of 15,000th

Endangered Species Commemorative Forever Stamps - Gallery - Joel

Island marmot to grace U.S. stamp series featuring endangered

Postal Service Spotlights Endangered Species - AllOnGeorgia