Photo: US Postal Service. Pluto - Explored! In 2006, NASA placed a 29-cent 1991 Pluto: Not Yet Explored stamp in the New Horizons spacecraft. In 2015 the spacecraft carried the stamp on its history-making mission to Pluto and beyond.
The 18th Amendment to the U.S. Constitution banned the manufacture, sale, and transportation of alcohol (i.e. the beginning of Prohibition). It was ratified on January 16, 1919 and repealed by the 21st Amendment in 1933.
Why is the Eighteenth Amendment to the US Constitution important? the 18th amendment is not important anymore because its gone the reason for is the 21 amenment The 18th amendment is the only time that the US Constitution has ever â¦ been amended to reduce the rights of citizens.