Quote:
Originally Posted by pooh
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
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If you go to the Nova Mars Dead or Alive at the bottom of this article and go to Ask The Expert, there is this Q&A:
Q: Is it possible that the things necessary to sustain life are different on other planets than they are on Earth?Westview 8th Grade, Denver, Colorado
A: It may be possible, but life as we know it needs relatively moderate temperatures and water to live. So, places with those conditions are the first place to look. We know that, at a minimum, life needs an energy source of some sort.
So the conjecture is "life as we know it". I guess I will have to go with that.
Thanks for the links.
Z