Mars has enormous water ice deposits and glaciers. It has a partly molten core. Water sinks thru a planet. So it is ridiculous to think there is no place where rising heat and downward sinking water meet. OBVIOUSLY there is a zone where these two meet and mix.
Nearly every month more water is found on the ‘bare and lifeless’ 4th rock from the sun. There was a time when most of this water ice was liquid. Water rushes gushes and seep into mars-ground.
So, let’s dare to think the plain and astoundingly clear and simple idea that life ain’t rare, here or anywhere, where there is water, heat, and something to munch on.