"A man who is a politician at forty is a statesman at three score and ten. It is at this age, when he would be too old to be a clerk or a gardener or a police-court magistrate, that he is ripe to govern a country."

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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