It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something ...

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 ...

These gas molecules are very tiny and spread out far apart from ... our eyes from all directions in the sky, and why the sky appears blue to us. The other colors in the visible spectrum, like ...