Ponderings on a Sunday morning

The sky was dark when I awoke from my slumber.  The wind howled outside, shaking the trees and screaching through the buildings.  It was quite loud.  A continuous groan, coming with peaks and troughs, but always there.  I lay in snug in my bed this morning looking out the window at the trees thrashing about.  It was like winter had come to us overnight.  The sky at that time was a dull grey but over the past hour and a half has turned to its usual deep blue.  As I've watched it change, it's got me wondering.  More of sitting here in wonder I guess, just thinking about the world and how it is able to support life such as ours.  I was thinking about what I new and what there was still to know.  I wondered about...

1. Wind.  How gusts can flow across the land.  If wind is caused by pressure then are the gusts caused by pressure on a much smaller scale?
2. The colour of the sky.  The shorter blue wavelengths are absorbed by the atmosphere and then radiated across the sky while the longer wave lengths such as the reds, yellows and oranges are not affected by the air.  The colours of sunset however are caused by the change in refraction of the light as it bends across the atmosphere.  The light takes a longer route through the atmosphere and less of the light reaches you.  Shorter wavelengths are scattered out leaving only the longer wavelengths.  Is the grey that is seen in the mornings due to the blue wavelengths refracting around but due to the position that they are hitting the earth causing even the blue, at that stage, to be refracted out.
3. Colour vision.  What would the world be like if humans didn't have colour vision?

I'll have to find out the answers to these questions.  Of course, there's always questions, it's just getting the answers that the hard part.