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- U.S. Flag Facts"There are 50 stars representing the 50 states and there are 13 stripes representing the 13 original colonies ... "
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- United States | Britannica Elementary
"Established in 1776, the United States is young compared to many other countries. Yet by the 1900s the United States had grown into a world power ... " - United States | CIA Factbook
"Britain's American colonies broke with the mother country in 1776 and were recognized as the new nation of the United States of America following the Treaty of Paris in 1783 ... " - United States (US) Geography | Country ReportsThe "world's third-largest country by size (after Russia and Canada) and by population (after China and India); Mt. McKinley is highest point in North America and Death Valley the lowest point on the continent ... "
- United States | National Geographic"The United States of America is the world's third largest country in size and nearly the third largest in terms of population ... "
- Climate: USA"Most regions (21) in United States lie in the Humid subtropical, no dry season climate zone (Köppen: Cfa). The mean average of annual temperatures range from a high of 24.12°C (75.42°F) in Florida to a low of -1.95°C (28.49°F) in Alaska ... "