taffybuns cartographerswithoutborders Mars has surface water, but not enough. Ceres, the largest asteroid, might be 25% water. If we simply crashed Ceres into Mars, that could cover 33% of Mars with oceans up to 5900 meters deep. (Spherical projection by request.) anarcho-shindouism ‘if we simply crashed Ceres into Mars” pickle-kun A D V A N C E DT E R R A F O R M I N G Source: cartographerswithoutborders