On the dwarf planet Ceres, a lone mountain called Ahuna Mons rises four kilometres from an otherwise flat, cratered plain, built not from lava but from erupting salty brine that froze solid. - Space Daily

Ceres is a world of subdued relief. Its charcoal-grey surface is crowded with impact scars, but between the craters much of the terrain rolls gently across the dwarf planet. Then one mountain breaks …