The Earth's core is some 4000 miles beneath our feet. Beneath the rocky surface lies massive amounts of liquid metals that generate a protective magnetic field. That field shields the planet from dangerous space radiation. Without it, Earth would be as barren as Mars. But with the inner core cooling, is that scenario inevitable?
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Earth Investigated - 2005x01 Earth's Core
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Jan 05, 2005
- Episode 2005x01
- Show special No
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