In the realm of physics, the speed of light is considered one of the most fundamental constants in the universe, dictating ...

Explore the science of light speed, if faster-than-light travel is possible, and the mysteries of moving slower than light.

What would happen if we could travel at the speed of light? In this mind-bending video, we explore the theoretical concept of light-speed travel and what it would be like if humans could somehow reach ...

The speed of light is 299,792,458 meters per second and that constant tells us much about cause and effect in the universe.

Light is faster than anything else in the known universe, though its speed can change depending on what it's passing through.

Slowing the speed of light is no easy process, though. In fact, it requires a very complex set up which includes cooling down atoms to extremely low temperatures close to absolute zero. This ...

The laws of special relativity say that there's nothing in the universe that's faster than the speed of light. So why do gamma-ray bursts seem to break that limit?

The glow from faster-than-light particles gives us a unique way to explore the universe.

In science fiction, spaceships moving at or beyond lightspeed enable all manner of universal exploration. But in Earth-bound reality, traveling at the speed of light (299,792,458 meters per second ...

If you were traveling in a rocket moving at 75% of the speed of light and your friend throws the ball at the same speed, you would not see the ball moving toward you at 150% of the speed of light.

When we measure the speed of light, it's always in two directions. Measuring it in one direction may be impossible.