In spring 1919, Albert Einstein’s theory of general relativity was tested during Arthur Eddington’s eclipse expedition to ...

As researchers detail in a study published today in the journal Nature, a star dubbed S301 exists so close to Sagittarius A*, ...

The weak-equivalence principle is integral to general relativity, so these test results offer yet more support for a core theory of our universe. In 1916, Albert Einstein dared to declare that Isaac ...

Albert Einstein’s mind reinvented space and time, foretelling a universe so bizarre and grand that it has challenged the limits of human imagination. An idea born in a Swiss patent office that evolved ...

What do Albert Einstein, the Global Positioning System (GPS), and a pair of stars 200,000 trillion miles from Earth have in common? While scientists have found incontrovertible evidence of ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A bizarre "cosmic glitch" in the theory of how the gravity of the ...

We all have some past events that we'd like to undo. These can be minor moments, such as a failed exam or an argument with friends, or world-changing incidents, such as the 2019 outbreak that led to ...

Learn how ocean-surface echoes reshape whale calls and why a similar effect in light would not violate Einstein’s theory of ...

A 54-page document handwritten in 1913-1914 by Albert Einstein and Swiss engineer Michele Besso, sold in Paris earlier today for €11.6 million (US$13.0 million). It’s not the most valuable document ...

Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Standing on the sandy, windswept shores of Provincetown, Massachusetts, people may find themselves squinting at the horizon, ...