system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's so special about finding liquid water on Mars?
gpt
On Earth wherever there is liquid water there is life, and wherever there is no liquid water there is no life. Its a direct correlation water is the one thing that *all* life on this planet depends on.

Does that hold true on Mars? On Earth water = life. On Mars, water = life? Maybe.

Obviously it does not mean there *is* life on Mars, but the one thing we know life (Earth life anyway) is absolutely dependent on, is also on Mars. It just makes it that much more possible that there really is alien life in our solar system.