avity, come from? How should we describe turbulence, the chaotic swirl of liquids and gases that has defied mathematical physicists for a century? If we knew, would we be able to predict weather patters and heart attacks? Can consciousness be explained in terms of electrical currents in neural networks, and possibly quantum mechanics, or is there more to it? For that matter, do we have to accept the strange laws of quantum mechanics without question, or will someone discover the clue that makes the quantum obvious, as Albert Einstein never stopped hoping? How did life begin? Are we alone in the universe? Until we can answer such questions with confidence, we cannot claim to have understood the world. Looking back we realize that we have learned much in this century, but of mysteries there is no end. The most impenetrable of them all is to predict what the next discovery will be....
