Came across a (https://www.youtube.com/watch?v=g6thUIR3_rI) which describes Earth’s magnetic field having switched hundreds if not thousands of times during Earth’s 4.5 billion years.
So, how do we know thats a fact? What are scientists looking at that helped them determine this?
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Imagine squeezing toothpaste out in a line on the table as you spin the tube and you can see a spiral form. Every few inches you spin the tube the opposite direction and you notice the spirals on the toothpaste go in a different pattern.
The earth is squeezing out magma/lava like you were squeezing out toothpaste. The earth’s magnetic field puts a “twist” on the magma as it cools making it magnetic as well. There’s a magnetic pattern that changes every few hundred meters away from where the earth is squeezing out the magma. This is like you noticing the change in spirals to tell when you changed spinning the toothpaste tube.
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