When an object moves extremely fast—close to the speed of light—certain basic assumptions that we take for granted no longer ...

There are a number of ways to measure the speed of light. If you’ve got an oscilloscope and a few spare parts, you can build your own apparatus for just a few bucks. Don’t believe the “lies ...

As you approach the speed of light, space and time begin to warp in ways that defy everyday logic. According to Einstein’s theory of relativity, time slows down dramatically for fast-moving ...