On a clear, sunny day, the sky above us often glows a brilliant blue, a sight so commonplace that many of us rarely stop to question why. While this natural phenomenon might seem simple to explain, ...

If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...

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