The bipolar see-saw hypothesis provides an explanation for why temperature shifts in the two hemispheres were out of phase at certain times. The hypothesis has now passed a test of one of its predictions.
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Severinghaus, J. Southern see-saw seen. Nature 457, 1093–1094 (2009). https://doi.org/10.1038/4571093a
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DOI: https://doi.org/10.1038/4571093a
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