The Mars cover package says that if the probes landing this week find frozen surface water, it could indicate that liquid water remains in the planet's warmer interior and that life could exist there.
There will never be any probes landing on Mars.
mnli hypothesis: There will never be any probes landing on Mars. premise: The Mars cover package says that if the probes landing this week find frozen surface water, it could indicate that liquid water remains in the planet's warmer interior and that life could exist there.