Ever since my research drew me into the alternatives to dark matter of MOdified Newtonian Dynamics (MOND), I have been reading more and more papers on the Aether. You may recall that the Aether was proposed as the means by which light propagates through space. Intuitively, this makes a lot of sense because all other waves propagate in a medium. Water waves are just water moving up and down. Sound waves are just air or water moving in and out.