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Question
The last pole reversal occurred ________ years ago and, based on magnetic field decay, we are approximately ________ years from entering the next phase.A) 1 million; 200,000
B) 20,0000; 50,000
C) 1,000; 50
D) 790,000; 1,000
Answer
This answer is hidden. It contains 1 characters.
Related questions
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