I love the different forms they take. There are the puffy cotton ball-like clouds against the blue sky — those iconic cumulus clouds. There are curlicue cirrus clouds wafting high above made of ice.

“It’s a pretty unique ... and appear as electric blue wisps in the night sky, reaching out toward the edge of space. Earlier this year, a Minnesota woman captured a cloud formation that ...

It's pretty well-known that most clouds are ... that scatter more blue light than other colors (making the sky blue), the tiny cloud particles equally scatter all colors of light, which together ...