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Taken from the January 2022 issue of Physics World where it first appeared under the headline "The twin streams of time". Sidney Perkowitz reviews The Janus Point: a New Theory of Time by Julian ...

Entropy, as a fundamental concept in thermodynamics, provides a powerful tool for understanding the behavior of nonequilibrium systems. However, measuring time-dependent entropy in nonequilibrium, ...

Today’s most advanced clocks keep time with an incredibly precise rhythm. But a new experiment suggests that clocks’ precision comes at a price: entropy. Entropy, or disorder, is created each time a ...

One of the enormous conceptual ideas that came along with Einstein's theory of relativity was the surprise that time itself, long considered fundamental and universal, is actually relative. Different ...

Every moment that passes finds us traveling from the past to the present and into the future, with time always flowing in the same direction. At no point does it ever appear to either stand still or ...