Earth’s days are not always exactly 24 hours, and recent measurements show unusual fluctuations. Some days are getting ...

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley ...

Light speed would allow instant trips across Earth and minutes to reach the Sun, but even at 300,000 km/s the expanding ...

Physicists tested light speed using cosmic gamma-ray bursts. Study confirms Einstein's prediction that all light colors travel at same speed.

Several Amazon employees have penned an urgent open letter to chief executive officer (CEO) Andy Jassy, decrying the tech giant's breakneck push into artificial intelligence (AI) as a reckless gamble ...

As it heads out of the solar system never to return, the deep space probe Voyager 1 is headed for yet another cosmic ...

Several leading quantum gravity theories predict that there is a dependence of the speed of light on photon energy, which would bridge incompatibilities between general relativity and quantum physics.

A Star Trek–inspired idea by Miguel Alcubierre kicked off decades of theory and experiments as scientists pursue plausible ...

They recreate how a camera would see objects traveling at 99.9% of the speed of light, revealing surprising relativistic ...

The speed of light has been one of science’s most trusted markers of stability. For more than a century, the idea that light ...

This means that it would still take a little over four whole years of traveling at lightspeed to reach the red dwarf—not that ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...