Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

Time travel is still very much science fiction, at least to us laymens.. But in the world of physics that’s not the case.

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

Josh Safdie and Chloé Zhao join forces for Variety's Directors on Directors to discuss their Oscar contenders 'Marty Supreme' ...

Now, two unrelated-but-similar experiments confirm that, in a double-slit experiment, detection of a photon’s path (its ...

Off Earth, identical atomic clocks won’t agree; gravity, motion and relativity make time flow differently, so Earth and Mars ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Contemporary physics has learned to describe the universe with unprecedented precision. Yet when it tries to say what time is, it stumbles again and ...

Last year delivered doses of drama and excitement in the space business, with a record number of launches, breathtaking ...

Which US rocket companies achieved the most during 2025? Once again, Ars Technica is here to provide some answers in the form ...