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The United States is a leader in the development of artificial intelligence technology and has maintained a space program since the late 1950s, with plans for long-term habitation of the Moon. [303] [304] In 2022, the United States was the country with the second-highest number of published scientific papers. [305]
The Encyclopædia Britannica ( Latin for 'British Encyclopædia') is a general knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The encyclopaedia is maintained by about 100 full-time editors and more than 4,000 contributors.
Currently, the CIA World Factbook gives 9,826,675 km 2 (3,794,100 sq mi), [7] the United Nations Statistics Division gives 9,629,091 km 2 (3,717,813 sq mi), [8] and the Encyclopedia Britannica gives 9,522,055 km 2 (3,676,486 sq mi) (Great Lakes area included but not coastal waters). [9] These sources consider only the 50 states and the Federal ...
The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed, and many saw transformations in the 16th century away from more densely populated lifestyles and towards reorganized polities elsewhere.
The first United States copyright law was passed on 30 May 1790—although anticipated by Section 8 of Article I of the United States Constitution (ratified 4 March 1789)—but did not protect foreign publications such as the Britannica. Unauthorized copying of the Britannica in America was also a problem with the 9th edition (1889).
The United States also developed the Global Positioning System, which is the world's pre-eminent satellite navigation system. U.S. astronaut Buzz Aldrin saluting the flag on the Moon during the Apollo 11, 1969. The United States is the only country that has sent crewed missions to the lunar surface.
Encyclopædia Britannica, Inc. Encyclopædia Britannica, Inc. is the company known for publishing the Encyclopædia Britannica, the world's oldest continuously published encyclopaedia. The company also owns the American dictionary publisher Merriam-Webster, and though historically British, is now based in Chicago, USA.
The United States expropriated from Panama additional areas around the soon-to-be-built Madden Dam and annexed them to the Panama Canal Zone. Caribbean Sea: May 3, 1932 The United States adjusted the border at Punta Paitilla in the Canal Zone, returning a small amount of land to Panama. This was the site for a planned new American embassy ...