Main Page

From Wikipedia, the free encyclopedia
Jump to: navigation, search

From today's featured article

Ceremony to present the Los Alamos Laboratory with the Army-Navy E Award at the Fuller Lodge

The Los Alamos Laboratory was a secret laboratory in a remote part of New Mexico established by the Manhattan Project during World War II and operated by the University of California. Its mission was to design and build the first atomic bombs. The laboratory was designing a plutonium gun-type fission weapon called Thin Man until April 1944, when it determined that the nuclear reactor-bred plutonium in the bomb could predetonate before the core was fully assembled. Robert Oppenheimer reorganized the laboratory, and orchestrated an all-out effort on an alternative design, an implosion-type nuclear weapon called Fat Man. The gun-type Little Boy was developed using uranium-235. The laboratory also built an aqueous homogeneous reactor, and researched the hydrogen bomb. The Fat Man design was used in the Trinity nuclear test on 16 July 1945, and laboratory personnel participated in the bombing of Hiroshima and Nagasaki as pit crews, weaponeers and observers. Oppenheimer was succeeded as director by Norris Bradbury in December 1945. After the war, assembly activities moved to Sandia. The Los Alamos Laboratory became the Los Alamos Scientific Laboratory in 1947. (Full article...)

Did you know...

Muhammad I and his Castilian ally
Muhammad I and his Castilian ally

In the news

Separation of the iceberg from the Larsen C Ice Shelf
Separation of the iceberg from the Larsen C Ice Shelf

On this day...

July 16: Feast day of Our Lady of Mount Carmel (Roman Catholic Church)

Mission San Diego de Alcalá
Mission San Diego de Alcalá

Fulrad (d. 784) · Anna Vyrubova (b. 1884) · Assata Shakur (b. 1947)

More anniversaries:

Today's featured picture

The Plumb-pudding in Danger

The Plumb-pudding in Danger (1805), an editorial cartoon by James Gillray showing the world being carved up into spheres of influence between William Pitt and Napoleon. It caricatures overtures made by Napoleon in January 1805 for a reconciliation with Britain during the War of the Third Coalition. Martin Rowson deems it "probably the most famous political cartoon of all time – it has been stolen over and over and over again by cartoonists ever since."

Illustration: James Gillray

Recently featured:

Other areas of Wikipedia

  • Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
  • Help desk – Ask questions about using Wikipedia.
  • Local embassy – For Wikipedia-related communication in languages other than English.
  • Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
  • Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
  • Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.

Wikipedia's sister projects

Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects: