CAPE CANAVERAL SPACE FORCE STATION — Despite the number of struggles Relativity Space has faced trying to get the world’s first 3D-printed rocket off the ground, it finally succeeded Wednesday night, ...

While a rancher may not be thinking about Einstein’s theory of relativity when using GPS to guide his tractor through a field or the proud owner of a new iPhone may not dwell over quantum mechanics, ...

The sharpest black hole collision ever detected just gave Einstein another win—and raised hopes that the next one might ...

This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

Of the more than 4,500 stars known to have planets, one puzzling statistic stands out. Even though nearly all stars are expected to have planets and ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

To most of us, time feels as solid as the phone alarm that drags us out of bed or the calendar that fills up faster than we ...

Vladimir Fock occupies a distinctive place in the history of twentieth-century science, not only for his profound ...

Lately we've been reporting about a series of studies on the Habitable Worlds Observatory (HWO), NASA's flagship telescope ...

Time has an arrow: It only ever seems to move in one direction. The future is always unknown to us, while the past forever remains locked and inaccessible. And yet, the vast majority of the laws of ...