Science
Who discovered the rotating magnetic field that is the basis of Alternating Current?
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What scientist first showed that a changing electric field produces a magnetic field?
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What is a steep-sided circular depression commonly known as?
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Which inhospitable desert holds the world's richest deposits of dinosaur remains?
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What is the rhythmic repetition surrounding the planetary day called?
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What is the name of an instrument that records vibrations in the Earth's crust?
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What scientist is credited with developing the first vaccine?
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Which planet has a great red spot that is probably a large storm?
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