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  1. Há 1 dia · The United States is the fourth largest country in the world in area (after Russia, Canada, and China ). The national capital is Washington, which is coextensive with the District of Columbia, the federal capital region created in 1790. United States. See article: flag of the United States of America.

  2. Há 2 dias · North America’s only land connection is to South America at the narrow Isthmus of Panama. Denali (Mount McKinley) in Alaska, rising 20,310 feet (6,190 metres) above sea level, is the continent’s highest point, and Death Valley in California, at 282 feet (86 metres) below sea level, is its lowest.

  3. www.nasa.govNASA

    Há 2 dias · NASA's Earth Information Center allows visitors to see how our planet is changing in six key areas: sea level rise and coastal impacts, health and air quality, wildfires, greenhouse gases, sustainable energy, and agriculture.

  4. Há 1 dia · South America, fourth largest continent in the world, the southern portion of the landmass generally referred to as the New World, the Western Hemisphere, or simply the Americas. The continent is compact and roughly triangular in shape. Learn more about South America.

  5. Há 1 dia · The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America. It is a federal union of 50 states, which also includes its federal capital district of Washington, D.C., and 326 Indian reservations.

  6. Há 4 dias · Buoyed by victories in World Wars I and II and the end of the Cold War in 1991, the US remains the world's most powerful nation state. Since the end of World War II, the economy has achieved relatively steady growth, low unemployment and inflation, and rapid advances in technology.

  7. Há 1 dia · In the history of the Americas, the pre-Columbian era, also known as the pre-contact era, spans from the original peopling of the Americas in the Upper Paleolithic to European colonization, which began with Christopher Columbus 's voyage of 1492. Usually, the era covers the history of Indigenous cultures until significant influence ...