An explorer goes to new places to discover what is there. It took hundreds of years and many explorers to explore all of the United States.

Pioneers are the first people to live in a new area. Many pioneers moved to the West in the 1800s.

A cowboy works with horses and cattle. There were many cowboys in Texas in the late 1800s.

An inventor makes something new. American inventions include the telephone, the light bulb, and computer games.