Science
What is the sticky bacteria that forms on teeth and gums?
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What tool uses a magnetic needle that points north?
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How long does it take for Saturn to rotate completely on its axis (a typical day)?
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Which of these is defined as "part of the electromagnetic spectrum that contains visible light"?
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What galaxy is closest in light years to the Milky Way Galaxy?
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What inherited syndrome is believed to be part of the make up of many serial killers?
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