https://techcrunch.com/2019/11/20/antarctic-tests-will-prepare-this-rover-for-a-possible-trip-to-an-icy-ocean-moon/

Exploring a distant moon usually means trundling around its uniquely inhospitable surface, but on icy ocean moons like Saturn’s Enceladus, it might be better to come at things from the bottom up. This rover soon to be tested in Antarctica could one day roll along the underside of a miles-thick ice crust in the ocean of a strange world.

It is thought that these oceanic moons may be the most likely on which to find signs of life past or present. But exploring them is no easy task.