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Originally Posted by zcaveman
First of all let me say that I do believe that there is life out there in the universe. And they are probably completely different than us. I do believe that people posting have seen these phenomena.
And I have a question: We keep sending probes to these different planets to see if there is water. For some reason our scientists believe that water equals life. Why do these scientists think that any other life form in the universe or other galaxy is like us and needs water to exist?
Just curious.
Z
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Actually, they're looking for LIQUID water, not ice or vapor. I've provided a link to "Life's Little Essential" from NOVA. It's interesting reading. Check out the link for a good explaination about why water is necessary for life.
http://www.pbs.org/wgbh/nova/origins/essential.html