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  1. Hace 2 días · 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. [304] [305] In 2022, the United States was the country with the second-highest number of published scientific papers. [306]

  2. Hace 17 horas · The United States is a country in North America that is a federal republic of 50 states. Besides the 48 conterminous states that occupy the middle latitudes of the continent, the United States includes the state of Alaska, at the northwestern extreme of North America, and the island state of Hawaii, in the mid-Pacific Ocean.

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  3. Hace 2 días · Reading of the United States Constitution of 1787. The Constitution of the United States is the supreme law of the United States. [3] It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution delineates the national frame and constrains the powers of the ...

    • September 17, 1787
    • June 21, 1788
  4. 2 de may. de 2024 · Las relaciones de Corea del Norte y Estados Unidos (en hangul, 조미관계; en hanja, 朝美關係; romanización revisada del coreano, Jomi gwangye; McCune-Reischauer, Chomi kwan'gye) han sido históricamente hostiles y se desarrollaron principalmente durante la Guerra de Corea.

  5. Hace 1 día · Climate. The climate of the Northeastern United States varies from northernmost state of Maine to its southernmost state in Maryland. The region's climate is influenced by its positional western to eastern flow of weather in the middle latitudes in the United States. Summers are normally warm in northern areas to hot in southern areas.

  6. Hace 2 días · The U.S. government requires all individuals entering or departing the United States by air, or entering the United States by sea from outside the Americas, to hold one of the following documents: [1] U.S. passport. Foreign passport; for entry, a U.S. visa is also required except for:

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