Arizona has some of the prettiest sunsets, but why? There's a science behind it. Here's what to know, including sunset times ...

A scattering of mid-level and high level clouds create colorful sunrises and sunsets. This is because the higher clouds intercept the longer wavelength red and orange light as the sun is setting.

But when one of the more vivid ones does happen, you'll spot everyone pausing to take in — or photograph — nature's most colorful show ... Salerno said our beautiful sunsets have to do ...