Editing Timeline of luminiferous aether (section)

=== Antiquity ===
: 4th-century BC – [[Aristotle]] publishes ''[[Physics (Aristotle)|Physics]]'', in which the aether is briefly described as being an element lighter than air that surrounds celestial bodies. He describes the aether in relation to other [[Classical element|elements]] – aether is lighter than air and is located above it, whereas air is lighter than water, and water is lighter than earth. In Aristotle's view, each element returns to its proper place when displaced, which explains why air rises, why earth and water fall, and why the heavens remain in place.<ref>[http://classics.mit.edu/Aristotle/physics.mb.txt "Physics by Aristotle"] Translated by R. P. Hardie and R. K. Gaye. The Internet Classics Archive</ref>