A historian is someone who studies and writes about the past. Historians investigate what happened long ago by examining old documents, letters, photographs, artifacts, and other evidence that people left behind. They piece together stories of how people lived, what they believed, why wars started, how societies changed, and countless other parts of human experience.

Historians ask probing questions and build arguments from evidence: Why did the Roman Empire fall? How did the Industrial Revolution change daily life? What caused people to migrate across continents? They evaluate evidence carefully, compare different accounts of the same events, and construct explanations about what happened and why it matters.

Some historians specialize in particular time periods, like ancient Egypt or the American Revolution. Others focus on specific topics, such as the history of medicine, sports, or technology. A historian might spend years researching a single question, reading thousands of pages of old newspapers or examining archaeological findings.

The work of historians helps us understand how we got to where we are today. When you read about Abraham Lincoln or learn about the invention of the printing press, you're benefiting from the careful research and writing of historians who dedicated themselves to uncovering and explaining those stories.