Quote:
Originally Posted by Thunderbird
I think you are forgetting that the poles reverses periodically, so the earth itself has no bottom or top up and down is the direction toward earth.
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The last reversal was about 800,000 years ago (Brunhes-Matuyama reversal), so for all of recorded history the orientation has been the same. Towards the center of the earth is only "down" with respect to gravity. If we look at it from a purely magnetic view, shouldn't there be an up and down?
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