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Solar System

An incredible likeness of being

Earth and the Moon share many puzzling chemical similarities. New analyses show that the last planet-sized body to hit Earth could have been similar enough to Earth to yield a Moon with an Earth-like composition. See Letter p.212

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Figure 1: Oxygen isotopic similarities and differences.

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Correspondence to Robin M. Canup.

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Canup, R. An incredible likeness of being. Nature 520, 169–170 (2015). https://doi.org/10.1038/520169a

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