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 ...

For a technical scientific term, entropy is pretty popular. I mean, it was the title of an episode of Buffy the Vampire Slayer, after all. Search the Internet for “entropy” quotes and you’ll find them ...

Caltech physicist Sean M. Carroll has been wrestling with the mystery of time. Most physical laws work equally well going backward or forward, yet time flows only in one direction. Writing in this ...

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 ...

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 ...

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 ...

What’s the price of an accurate clock? Entropy, a new study has revealed. Entropy — or disorder — is created every time a clock ticks. Now scientists working with a tiny clock have proven a simple ...