Also known as the United States, the U.S., the U.S.A., the U.S. of A., the States, America is a country in North America, which shares borders with Canada and Mexico, and extends from the Pacific to the Atlantic Ocean. At over 9.5 million square km, America is the fourth largest country in the world and the third most populous with 300 million people. The only superpower in the world, America was discovered by Christopher Columbus in 1492 and is a land with extremely varied geography dominated by high mountains in the west, plains in the central and north as well as waterland in the southeastern parts. The highest point is mount McKinley in Alaska..

  America has extemes in climate that can range from minus 62 celcius in northern Alaska to 57 degrees celcius in Death Valley, California. Some parts of the country in Utah and Arizona can go for years without any percipitation but others like Mount Rainier can receive more than 2000 cm of snow every year. America has over 17000 native plant, over 400 species of mammal, 700 species of bird, 500 species of reptile and amphibian, and 90,000 species of insect.en documented.