Science
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Are there any limits to scientific knowledge?
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How do we measure the speed of light?
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What are the effects of climate change?
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When did the first life forms appear?
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What are the fundamental forces of the universe?
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How do cells communicate with each other?
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Could we create life in a laboratory?
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Can we predict earthquakes with accuracy?
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Where are the largest known galaxies located?
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What is the structure of a DNA molecule?