Books et al.Physics

Rethinking the arrow of time

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Science  30 Sep 2016:
Vol. 353, Issue 6307, pp. 1504
DOI: 10.1126/science.aah6871

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Is time discrete or continuous? What is the smallest measurement of time that we can make? And does time actually pass faster as we age, or is it just our perception? You may consider such questions to be metaphysical or philosophical, but in Now: The Physics of Time Richard Muller ponders these and other questions through the lens of a number of major 20th century physics discoveries. In doing so, Muller successfully introduces and describes most, if not all, of the key elements in an undergraduate physics course, masterfully connecting them with the conceptual thread of "the arrow of time."