United Nations stamps, plus two messages-in-bottles stories

Did you know the United Nations issues its own stamps? It does. They're in US currency and sold only at UN headquarters. The first was sold on United Nations day (24 October) in 1951. They're also issued in euros and Swiss currency in the UN's Vienna and Geneva offices.

Human rights, the environment, endangered species and peace are all subjects of universal concern to the peoples of the world. They are also subjects which the United Nations Postal Administration (UNPA) has promoted on its st...