15 ago 322 ano antes da era comum - Aristotle - 322 B.C.
Descrição:
 Came up with the theory that all substances were made of Fire, Water, Air, and Earth. He taught his beliefs, and he was so well known for his teachings, most believed him to be right. 
Adicionado na linha do tempo:
Data:
15 ago 322 ano antes da era comum
Agora
 ~ 2350 years ago