A billionaire-backed project promised humanity could reach another star within a single lifetime. The idea sounded impossible ...

The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts under ...

The universe has a speed limit, and it's the speed of light. Nothing can travel faster than light — not even our best spacecraft — according to the laws of physics. So, what is the speed of light?

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 ...

For the first time, researchers have detected empty voids moving faster than the speed of light — and they blazed past that cosmic speed limit without breaking the laws of relativity. A recent study ...

If the speed of light were much slower, a lot of very odd effects, from redshift to time dilation, would be a lot more ...