Is the blue sky not actually blue?On a clear day, the sky is a deep, clear blue... But the sky isn't painted blue. The air isn't colored either. So why does the sky look blue?SunlightSunlight contains ...

Gazing into the deep blue sky can invoke a sense that you're peering into the infinite. That sea of blue you see above your head looks like it never ends, but it may shock you that it only appears ...

Add Yahoo as a preferred source to see more of our stories on Google. The sky isn't just blue by chance. It takes all the colors of the rainbow for us to see it that way. It happens because of ...

Look up! The sky takes on an extra-blue hue in the fall, because of low humidity and an increased amount of Rayleigh scattering.

The sky takes on an extra-blue hue in the fall, because of low humidity and an increased amount of Rayleigh scattering.