The unexpected ocean on Mimas, a moon of Saturn, expands the list of worlds where to search for life in the Solar System. A French team has found evidence that suggests that this satellite discovered in 1789 by William Hershchel has an ocean beneath its icy surface sculpted by craters.
It would be a relatively recent ocean (on geological scales) and still evolving. Through models and simulations, they have also calculated that the ocean would have emerged between two and 25 million years ago.