The aether: Invented by Isaac Newton, reinvented by James Clerk Maxwell. This is the stuff that fills up the empty space of the universe. Discredited and discarded by Einstein, the aether is now making a Nixonian comeback. It's really the vacuum, but burdened by theoretical, ghostly particles.
Leon M. Lederman, Dick Teresi (1993). “The God Particle: If the Universe is the Answer, what is the Question?”, p.13, Houghton Mifflin Harcourt
