A new theory of "dark photons" attempted to explain a centuries-old experiment in a new way this year, in an effort to change ...

From frozen bonfires to quantum physics, why light still matters to our hopes, our science and our long Alaska winters.

Describing matter under extreme conditions, such as those found inside neutron stars, remains an unsolved problem. The ...

Neil deGrasse Tyson explores why the speed of light is a fundamental limit of the universe, shaping causality, time, and ...

Brian Cox explores what makes light unique in physics, revealing how its constant speed shapes space, time, and our ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from ...

Physicists have checked again whether light of different colors travels at different speeds, and once more it seems not to budge. They timed energetic photons from distant cosmic blasts to see whether ...

110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

Physicists in Vienna staged how a cube and a sphere would look in a camera if they raced at 99.9 percent of light speed. They used lasers and ultrafast cameras to build a single snapshot from many ...

In 1887 one of the most important experiments in the history of physics took place. American scientists Michelson and Morley failed to measure the speed of the Earth by comparing the speed of light in ...

Researchers at Tsinghua University developed the Optical Feature Extraction Engine (OFE2), an optical engine that processes data at 12.5 GHz using light rather than electricity. Its integrated ...