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This contrasts with museum exhibitions that frequently present science simply as expert knowledge , and with the activities in many science centres , which often lead along pre-determined routes to the discovery of particular concepts or principles . When the tools exceed the norm , however , it is probably because there was a certain kind of production at the mission . For the unity he used , among other terms , the word substantia . What really makes Daniel 's world-building unique is his conception of ' The Met ' - - a system of spider web-like cables in space that connect the planets orbiting the Sun within the ring of the asteroid belt .