A beam of light can cross the entire universe in no time at all
A photon can cross a billion light-years while accumulating no elapsed time along its path. Special relativity links…
Physicists use thorium-229 to power the world’s first working nuclear clock
A clock built from thorium-229 has crossed an important line, from a long-discussed concept to a working device.…
Physicists Just Built the First-Ever Nuclear Clock
The best timekeepers today—atomic clocks—work off the quantum vibrations of an atom, specifically its electrons. But physicists have…
Atomic clocks may be powerful enough to detect the quantum fabric of time
Time feels familiar. It marks every moment of daily life, from the ticking of a wall clock to…
“Different Flows of Time All Exist at the Same Moment”: Scientists Claim Trapped-Ion Atomic Clocks Can Observe “Quantum Superposition of Time”
An international team of researchers has demonstrated a theoretical framework showing that state-of-the-art trapped-ion atomic clocks could be…
Scientists make ytterbium atomic clock that could detect dark matter
Physicists have developed a highly precise and ultra-sensitive atomic clock based on ytterbium, which could test the limits…
Explainer: What is an atomic clock and why it is crucial for navigation satellites
Ten years after it was placed in orbit as part of the four-spacecraft Indian Regional Navigation Satellite System,…
Scientists Just Discovered a Quantum Physics Loophole—And It Could Finally Unlock Interstellar Travel
“Hearst Magazines and Yahoo may earn commission or revenue on some items through these links.” Here’s what you’ll…
Wilczek’s Multiverse | Why it is time for the world to think about the 3 faces of time
In the eighth instalment of his exclusive monthly series for the South China Morning Post, American theoretical physicist…