ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don’t always ...

THE blue color of the sky on a clear day is familiar to all. And yet how many have considered the source of this delicate mantle of azure which Nature spreads over the dome of the heavens? The ...

On a bright, clear day, the sky stretches above us in a brilliant shade of blue. But have you ever wondered why? The answer lies in a fascinating phenomenon known as Rayleigh scattering, discovered by ...