From the Earth's Core to her Magnetosphere PCPG's A Poorly Sorted but Well Rounded Series

We don’t normally think about the relationship between the core of the Earth and the ability of the planet to support life. But it turns out that complex life on Earth would be impossible without a spinning iron-rich core producing the magnetosphere that shields us from the deadly solar wind. Let’s take a look upward and downward and examine the center of the Earth as well as its far-flung outer boundary.