A newly detected gravitational wave, GW250114, is giving scientists their clearest look yet at a black hole collision—and a powerful way to test Einstein’s theory of gravity. Its clarity allowed ...

You might think galaxies can’t ever find each other in our runaway cosmos, but it turns out gravity can sometimes overcome ...

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

From the fall of an apple to the glow of the farthest known star, gravity quietly choreographs almost everything that happens ...

New York City drivers are bracing for two weeks of congested streets as world leaders flock to the east side of Manhattan for the 79th United Nations General Assembly. The gathering runs from Tuesday, ...