Occasionally I see references in Astronomy to the speed of something as "supersonic." I'm having trouble reconciling this ...

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?

Imagine what would happen if a marshmallow hit the Earth at 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 ...

A physicist has triggered intense scientific debate after claiming the Great Pyramid of Giza was deliberately built on an alien GPS coordinate that mirrors the speed of light. In a highly ...