Sometimes, under direct sunlight, clouds will appear gray or dark gray against a blue sky or larger backdrop of white clouds. There are usually two reasons for this effect.

Why is the sky blue on Earth, yet space appears pitch black? This video uncovers the science behind one of nature’s most ...

LOUISVILLE, Ky. (WAVE) - We see our skies as blue unless, of course, if clouds cover them. During the Fall and Winter, skies appear more vibrantly blue than during the summer months. In the summer, ...