Journey Toward the Center of the Earth
Unexplainable
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Unexplainable - Episode 6
Meredith Hoddnott: We're halfway through this really cool book and we get to keep reading. So it's like chapter six, the end for now. Liz Kelly Nelson: I can't wait for chapters seven. It every time I think about it, it's exciting. Do you know of any other unsolved geological mysteries? Email unexplainable at Vox.com.
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