Quote Originally Posted by Yaridovich View Post
I've heard that it's because of the refraction of light on particles in the air. It avoids all light in the spectrum except blue, which it causes to spread in the sky.


Or something like that.

Why are dogs better than cats?
Why does the light refract?

(it has to be like the annoying 'why? why? why?' stupidity that kids do when they find out about causality)