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

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

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

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

Since Einstein, physicists have found that certain entities can reach superluminal (that means "faster-than-light") speeds and still follow the cosmic rules laid down by special relativity.

Astronomers have directly observed a spinning black hole twisting spacetime, confirming a century-old prediction of ...

Most people think time speeds up because life gets busier. In reality, as adults, we begin to sleepwalk through life. The same routes, the same offices, the same conversations, the same gossip, the ...

The scientists realized that these supernovae weren’t as nearby as they had thought, so they had zipped away from Earth quicker than expected. “These observations led scientists to ultimately conclude ...

Experienced network designers know that the performance achievable of a data link depends on many factors, including the ...

The findings from the University of Sheffield relate to the possible relationship between dark matter, the mysterious, ...

This episode of the Physics World Weekly podcast features Alex May, whose research explores the intersection of quantum ...

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