Encyclopedia > Duration

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A duration is an amount of time or a particular time interval. For example, an event in the common sense has a duration greater than zero (but not very long), but in certain specialised senses, a duration of zero.

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Robert Heinlein

... become a national best-seller -- readers who did not read SF books as a rule were interested in Heinlein's philosophy, as expressed in that novel, which transcended what was ...