All through history, human beings have been attracted to the Universe and answering questions such as what are we doing here, who put us here, are we the only thinking species on the universe and so. Proof of this is the huge money we invest in researching space and its characteristics. If you have been following the news recently, then you know that the NASA answered the long time question a lot of people had: is there water on Mars? Well, there is. And, for some people, that means the proof that there is life on Mars since water allows microorganisms to live.
Recent studies claim that even though there is water on Mars, there is not as much as needed. Also, we don’t even know if with just water a species could be born on a whole different planet with different characteristics as the Earth. For example, how do you know that, if there were life on Mars, they would drink water and that’s what they needed to survive? We know that the human needs water but we don’t know if aliens do.
Regarding life in other planets or galaxies, we tend to think that other species would need the same nutrients as we do to survive.