Science

What is the hardest known natural material?

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What makes up about 70 percent of most living things?
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Which 5" telescope would have an optical tube with the shortest length?
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Which of these measurements of distance is the longest?
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How many coulombs does one ampere-hour equal?
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What is the full name for CFCs?
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Besides the V rockets for Germany, what was the most famous rocket that von Braun developed?
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The process by which plants make food is called what?
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Which planet of our solar system has the most known moons?
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