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

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 ...

Getting old can get lonely, especially if you are a widow. However a social group that calls itself 'Geezers in Sneakers ...

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

Time really does move faster on Mars, but the breakthrough that confirms it did not come from a spacecraft’s stopwatch.

Astronomers have seen spacetime itself wobble near a spinning black hole for the first time. The discovery, revealed during a star’s destruction, confirms a major prediction of Einstein’s theory of ...

But there are several important anomalies, including a widely debated one called the Hubble tension. It is named after Edwin ...

While 2025 saw a record number of launches —including crewed exploration, science missions, and even an historic first ...

C hina has decided to take hypergravity to a whole new level – testing both materials and fundamental physics in a regime we ...

Former SpaceX propulsion CTO Thomas Mueller’s space startup reached unicorn status this year thanks to $525 million in ...

A student-organized “tech fast” at St. John’s College led to a mass unplugging by curious undergrads. Some found clarity; ...