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  2. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    Benjamin Franklin — George Washington The First U.S. Postage Stamps, issued 1847. The first stamp issues were authorized by an act of Congress and approved on March 3, 1847. [20] The earliest known use of the Franklin 5¢ is July 7, 1847, while the earliest known use of the Washington 10¢ is July 2, 1847.

  3. List of tectonic plates - Wikipedia

    en.wikipedia.org/wiki/List_of_tectonic_plates

    This is a list of tectonic plates on Earth's surface. Tectonic plates are pieces of Earth's crust and uppermost mantle, together referred to as the lithosphere. The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from ...

  4. List of people on the postage stamps of the United States

    en.wikipedia.org/wiki/List_of_people_on_the...

    Since the United States Post Office (now United States Postal Service or USPS) issued its first stamp in 1847, over 4,000 stamps have been issued and over 800 people featured. People have been featured on multiple stamps in one issue, or over time, such as various Presidents of the United States.

  5. Mae Jemison - Wikipedia

    en.wikipedia.org/wiki/Mae_Jemison

    Mae Carol Jemison (born October 17, 1956) is an American engineer, physician, and former NASA astronaut. She became the first African-American woman to travel into space when she served as a mission specialist aboard the Space Shuttle Endeavour in 1992. Jemison joined NASA's astronaut corps in 1987 and was selected to serve for the STS-47 ...

  6. Plate tectonics - Wikipedia

    en.wikipedia.org/wiki/Plate_tectonics

    Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) 'pertaining to building') [ 1] is the scientific theory that Earth 's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago. [ 2][ 3][ 4] The model builds on the concept of continental ...

  7. Postal orders of the Orange Free State - Wikipedia

    en.wikipedia.org/wiki/Postal_Orders_of_the...

    The postal notes and postal orders of the other three entities were also allowed to be paid in the Orange Free State under the terms of the South African Postal Union Convention (which came into effect on 1 January 1898), but the postal notes and the postal orders had to be repatriated back to the issuing entity after being cashed.

  8. Postage stamps and postal history of South Africa - Wikipedia

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    The Second World War was the impetus for another well-known South African stamp format, the so-called “bantams”. In 1941 a set of stamps was issued to publicise the War Effort. Between 1942 and 1944 these stamps were reprinted in a much smaller format, between half and one third the size of the previously issued stamps, hence the nickname ...

  9. Timeline of postal history - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_postal_history

    1840 6 May - The Penny Black and Two Pence Blue, world's first postage stamps, become valid for the pre-payment of postage. 1842 1 February City Despatch Post New York local post. 1843 1 March - Zürich issue their first stamps: Zürich 4 and 6. 1843 1 August - Bull's Eyes, first stamps of Brazil.