The speed of gravity is taken to be exactly equal to the speed of light. But is that necessarily true? Here's how we know.

General Relativity has nothing to do with light or electromagnetism at all. So how to gravitational waves know to travel at the speed of light?

Most people use speed and velocity interchangeably. But to physicists, the two have very specific, and different, meanings. To complicate matters further, not all physics textbooks agree on the ...

iPhone/iPod touch: Evernote, the brain-expanding memory and note tool, is making full use of the iPhone 3.0 features with a new version that makes ...

Add in the instantaneous speed and informational overload of online culture, and it becomes a whole lot to keep up with. It might even start to feel like you need a translator to be able to engage ...

A leading exercise physiologist suggests developing a top speed two times faster than your marathon pace for a “speed reserve.” Here’s how to improve yours.

This year, we celebrate nine decades of Wirephoto, the technology that transmitted photos from 1935 to 1995, bringing unforgettable images to millions worldwide at near instantaneous speed.

For 4th Level Science, describe and examine the motion of a moving object, calculating acceleration, distance and average speed.