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National Geographic Channel: Naked Science: Earth's Core

Posted on: August 17, 2005 | Views: 1,169 | Comment

The Earth's core generates a protective magnetic shield around the planet. Are weak spots in the shield a sign that our planet's magnetic poles are on the verge of flipping? 

Tags:
national geographic • core • center • skydiver • skydiving • earth's core • lava • documentary