Why does the Earth have a magnetic field? And why is it important that the Earth has a magnetic field?

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Inspired by a couple of other posts I saw today

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Anonymous 0 Comments

Humans are hairless monkeys with fragile DNA*
Edit* so does every other living thing. Just in case I had to point that out.

The Sun is a magnanimous sphere of infernal plasma whose radiation whips out at us constantly

Thank mother earth we happen to have a swirling molten core of metal which generates the magnetic shield.

The explanation a 5yo could understand:

Metal in motion makes a magnetic field

The same way that a magnetic field will make a metal undergo motion

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