Light always moves at the same speed no matter how fast you are going. This simple rule forces time itself to adjust. This ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why does time change when traveling close to the ...

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 ...