Let those in love wax long and ardently about the gossamer quality of their emotional state. No less tantalizing or challenging is the task of describing the passage of time. As with love, many ways exist. Scientists and engineers who study time or deal with the evanescent stuff in the course of experiments express its passage in terms of numbers, equations, and curves on graphs. Artists use other media: musicians delineate time through notes and spaces; visual artists must seek out objects or scenes that convey the concept.

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