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 [email protected]. Why is the sky blue? – Mariana A-E., age 11, ...

When the Sun is near the horizon, its light passes through a lot more of the atmosphere to reach the Earth's surface than ...