The Earth's magnetic field protects life from harmful solar radiation from "summary" of Earth in Human Hands by David Grinspoon
The Earth's magnetic field is like a protective shield that surrounds our planet, shielding us from the harmful solar radiation that bombards us from the Sun. This invisible force field is crucial for the existence of life on Earth, as without it, our planet would be exposed to dangerous levels of radiation that could sterilize the surface and make it uninhabitable. This is because the Sun emits a stream of charged particles known as the solar wind, which would strip away our atmosphere and expose us to deadly levels of radiation if not for the Earth's magnetic field. The Earth's magnetic field is generated by the movement of molten iron and nickel in the planet's outer core. This creates a complex and dynamic magnetic field that extends out into space, forming a protective bubble around the Earth. This magnetic field deflects the majority of the solar wind away from the planet, preventing it from reaching the surface and causing harm to living organisms. Without this shield, life as we know it wou...
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