Science is filled with unanswered questions. What's the first scientific question you ever remember asking?
Maybe you wondered why the sky was blue or how gravity worked or something else entirely. Tell us in the comments what the question was and when (or if) you ever got your answer.
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DISCUSSION
You hit the nail with the topic picture. "Why is the sky blue." The answer is one I always talk about. "It's not. The sky is clear. The interaction with the atmosphere and particles is what makes it blue."