The speed of light is constant, or so textbooks say. But some scientists are exploring the possibility that this cosmic speed limit changes, a consequence of the nature of the vacuum of space. The ...

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?

When I’m 2,000-plus vertical feet and 10 miles into a hike, the last thing I want to think about is the weight of my pack pulling me down. Luckily, as I hiked wearing the Deuter Speed Lite Pro, the ...

Upgraded for 2025 with a lighter and more eco-friendly design, deuter’s popular Speed Lite Pro series of backpacks has ...

One of Einstein's most famous fundamental laws is that nothing in the Universe can travel faster than the speed of light in a vacuum. If you're a massless particle, you must travel at that speed, and ...

The glow from faster-than-light particles gives us a unique way to explore the universe. Nothing can travel faster than light — in a vacuum. But when light slows down, sometimes matter can blaze past ...

Simple, child-like curiosity taught us at a young age, that if we push an object, it will move. If we push harder, it will move faster and remain in motion longer. Clearly though, there are both ...

The speed of light is constant, or so textbooks say. But some scientists are exploring the possibility that this cosmic speed limit changes, a consequence of the nature of the vacuum of space. The ...