🚀 go-pugleaf

Andrew Mullhaupt writes:
> Why is the sky blue?

You'll get lots and lots of answers, and I'll bet my tenure that not one 
of them will address the question "Why?"; they'll all address the question 
"How?".  They'll go on and on about scattering of light from Nitrogen 
molecules, but the question of "Why?" is much harder.  The mechanism that 
makes the sky blue is well understood, but why does that mechanism exist, 
instead of one that makes the sky, say, green?  This rapidly gets into 
metaphysics; I think the answer has to do with conditions that make it 
possible for us to exist to ask the question in the first place.

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* These are my opinions only.*
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