Aether (classical element) - Wikipedia
Aether: Searching for the Fifth Element of the Ancients
以太 - 维基百科,自由的百科全书
Classical element - Wikipedia
The Eternal Quest for Aether | Aether History, What Is It?
The existence of aether and the refutation of void in Aristotle: A ...
The Vital Heat, the Inborn Pneuma and the Aether
Aether - (Intro to Aristotle) - Vocab, Definition, Explanations