Which type of scientist studies and analyzes past events in order to explain "what, how, or why something happened"?

Historians are the type of scientists who studies and analyzes past events in order to explain "what, how, or why something happened

Explanation:

History can be described as the study of events which occurred in the past. Historians are the scientists which are interested to study the history of any event which took place on earth. Some historians might be interested in the history of how earth formed, others might be interested in finding out how different countries or sub-continent was formed. Hence, everything related to history is studied by the historians.