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Planetary science

Forming the martian great divide

Early in its history, Mars suffered a convulsion that left a lasting geological and topographical scar. The latest work adds to evidence that the cause was external — a massive impact.

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Figure 1: The martian hemispheric dichotomy.

NASA

Figure 2: Crust with a difference.

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See Editorial, page 1143 . The researchers involved talk about this work and demonstrate the modelling behind it in this Nature video

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Kiefer, W. Forming the martian great divide. Nature 453, 1191–1192 (2008). https://doi.org/10.1038/4531191a

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