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The Science of Magnetism

5 Live Science Podcast

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Plate Tectonics and Earth's Magnetic Field - What's the Walker Feedback?

Evidence shows that by about 4 billion years ago, there was life established on Earth. Plate tectonics not only creates the environments that living things can make a living off of but it also plays a whole bunch of different roles in stabilizing the climate over billions of years. Without this ability to ship away CO2 in the form of rock and buried in the deep Earth, it's believed that CO2 would build up in the atmosphere.

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