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Question generated: According to the Big Bang Theory, which element most likely formed first?

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Question generated: In order to record the passing of a distant comet, which instruments would be the most useful?

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Question generated: Which illness is always caused by an infection?

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Question generated:
The change in the use of one model of the solar system to the use of another model resulted in major changes in science and society. Which two scientists produced the earlier and later models, respectively?