Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

Every year, our planet makes one full trip around the Sun. And while that means we’re already moving at breakneck speeds, we’re about to ramp that speed up. Like, way up! Let’s turn Earth into a ...

Light travels unimaginably fast, zipping across the vacuum of space at nearly 300,000 kilometres per second. This figure is so fundamental that it's used as a cornerstone in modern physics and ...

So, you’re driving a car at half the speed of light. (Both hands on the wheel, please.) You turn on the headlights. How fast would you see this light traveling? What about a person standing by the ...