From tiny molecules to the vast expanse of the atmosphere, the blue sky is a testament to the elegance of the natural world. The next time you look up on a clear day, pause for a moment to ...

That visual evidence embraced vast expanses of blue sky, coexisting peacefully with fleets of white-topped clouds. The cloud tops seemed almost incandescent with the brilliance of Friday’s ...

A chimpanzee named Vanilla looked in awe, seeing a vast, open blue sky for the first time after living in captivity. The animal protection organization Save The Chimps posted a heartwarming video ...

Shorter wavelengths of the color spectrum, like blue, scatter easily when they hit the atmosphere. That's why a vast sky can look blue in the middle of the day, when sunlight can shine straight ...