Earth's continents are the seven major landmasses that make up the planet's solid surface.

China boasts one of the world's oldest and most influential civilizations, with a history spanning thousands of years.

The Tropic of Cancer is an imaginary line located at approximately 23.5 degrees north latitude of the Earth's equator.

Pax Americana, Latin for "American Peace," refers to a period of relative global stability and peace that has been maintained largely through the dominant influence and military power of the United States.