Nature Astronomy, Published online: 18 September 2024; doi:10.1038/s41550-024-02316-6

Ceres’s surface is ice-rich and warm, so we expect craters to viscously flow. Yet most of Ceres’s craters are not shallow. A new model that includes a stronger, progressively dirtier icy crust, frozen from an ancient ocean, may reconcile this discrepancy.

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