Inside This Giant Metal Sphere Lives a Miniature Version of the Earth's Spinning Core [Video]

So how do you study the Earth's core and magnetic fields when it's protected by 1,800 miles of crust? Easy—you just build your own miniature version in a laboratory, using over 28,000 pounds of molten sodium. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/0ny4o7nlBo8/inside-this-giant-metal-sphere-lives-a-miniature-version-of-the-earths-spinning-core

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