Okay, I looked it up on Wikipedia:
A [/size]historian[/color][/size] is a person who researches, studies, and writes about the past, and is regarded as an authority on it.[/color][/size] Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time.[/color]
So, that kinda explains it, I guess.
Biggest achievement of you life?