Many visitors come to the Old Barracks and marvel at all the information we give them. Some even ask how we know these facts. History is not just facts and dates. Historians generally agree that history proper begins when humans began to communicate by writing.
Prehistory is the time before the invention of a recordable language.
We have yet to see a letter from a T-Rex. History is the written record of past events. Historical research is dependent upon the individuals who write it. Everyone has their own perspective concerning an event. The viewpoint changes over time.