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Humming a different tune

Earth breathes in and out, murmuring gently to itself as it does so. The habit has been ascribed to the tickling effects of ocean waves — but a new-found twisting oscillation might reopen the search for the source.

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Figure 1: A new twist.


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Tanimoto, T. Humming a different tune. Nature 452, 539–541 (2008).

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