The United States is the third most populous country in the world, with a population of over 331 million people.
The United States has the world's largest economy, with a GDP of over $21 trillion.
The US Constitution is the oldest written constitution still in use today, having been adopted in 1787.
The US flag, known as the Stars and Stripes, has 13 horizontal stripes representing the original 13 colonies, and 50 stars representing the 50 states.
The US has the highest number of billionaires in the world, with over 700.
NASA, the National Aeronautics and Space Administration, is headquartered in the US and has been responsible for some of the most significant advances in space exploration.
The US is home to some of the most prestigious universities in the world, including Harvard, Stanford, and MIT.
Baseball, which originated in the US in the 18th century, is one of the most popular sports in the country.
The United States has more airports than any other country in the world, with over 15,000.
The US is a multicultural society, with over 325 languages spoken in the country.