How long for Life on Earth to disappear after the magnetic field is gone?
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Evil Wizard got his hands on a Handwavium Wand, and wished the Earth's magnetic field no more.
Now the surface is vulnerable to solar wind, solar radiation and cosmic radiation.
How long will it be till life is gone on the planet (land) surface?
Bonus points if you state how long till the oceans are also void of life.
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