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 ...

Last year may have zipped by for many adults. It can feel like January happened just yesterday. But for children, last year’s holiday season might seem like it took place forever ago. That gap in how ...

The principle of relativity, as initially described by Galileo, posits that the laws of physics remain consistent regardless of an observer's relative motion. Einstein's special relativity ...