The timeline of the lunar bombardment: Revisited

•The lunar mantle started to record highly siderophile elements only since the complete crystallization of the lunar magma ocean and mantle overturn.•The imbalance in highly siderophile elements abundances in the terrestrial and lunar mantles is explained by the elate crystallization of the lunar magma ocean.•The cratering record of the Moon 3–4 Gy ago is consistent with a monotonic decline of the bombardment.