Why the sky is blue, the true story.
Many years ago, traveling in the high reaches of Tibet, I happened upon a wisened old lama and asked him, "Why is the sky blue?"
He told me, "The sky is blue, young grasshopper, because if it was green you wouldn't know where to stop mowing."
Now, mind you, I never actually saw a lawn in Tibet, but the answer seemed to make sense at the time...
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