> Similarly the correct answer to "Why is the sky blue?" is: "It isn't - small particles reflect ultraviolet even better than blue. We just can't (consciously)

> Similarly the correct answer to "Why is the sky blue?" is: "It isn't - small particles reflect ultraviolet even better than blue. We just can't (consciously) see those colors." Cliff Stoll gives a great anecdote about this. He's asked "Why is the sky blue", and to every answer he gives the interviewer asks "Why?" Turns out it's a bit complicated. https://www.youtube.com/watch?v=yfm3MFj6LLU https://www.youtube.com/watch?v=yfm3MFj6LLU