earth science

historic, historical / already-happened, past / former, old, traditional

historian

study of history

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

oral history

historicism

middle, medium / average; neither good nor poor / during; being in the process of doing / second volume of a three volume set

China or Chinese; Sino- (prefix)

being in the process of doing