Who was Kristian Birkeland?


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This week is the 100th anniversary of Kristian Birkeland’s death, and people are celebrating his life and work. But who was Kristian Birkeland?

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Is a magnetic field reversal imminent?


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The Earth’s magnetic field has reversed polarity several times in its history. But when might the magnetic field reverse again? And what might it mean for the aurora?

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