<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I think it is more of a comfort factor when coming to a conclusion. If you only have one object, you have no reason to conclude there is more than one. If you have two of the same object, then you can conclude, with 100% certainty, there is more than one. If there's more than one, than the possibility of more than two is signifcantly increased. <br /> Posted by derekmcd</DIV></p><p>If we find microbes past or present on mars, it would fill in another part of the Drake equation. <font size="5">F</font>l </p><p> http://en.wikipedia.org/wiki/Drake_equation</p><p> We could say with more confidence, 100% of planets cabable of supporting life, will at some point. Planetary transfer and/or seperate origin. I.E. If we find microbes that are Martian in origin, then life readily develops on planets in the "life zone". If the microbes are Earth transfer or vice versa, then even if life does not develop on its own in the "life zone" transfer is likely. Thus for the purpose of the Drake equation "Are there alien civilizations out there, if so how many?" The answer would be closer to the 10,000 or so planets in our galaxy that have civilizations capable of communication. This does not however, speak to; are they here? The distances between stars are so great, it seams unlikely, but not impossible. We must humble ourselves to the idea; we don't know everything, and there may be ways around the "cosmic speed limit 186,000 mi./sec."</p><p>Personally, I find the pilot encounters with a corresponding radar target quite interesting.<img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-smile.gif" border="0" alt="Smile" title="Smile" /> </p><p>The bottem line: Until an alien shows up and says "we come in peace" and/or "move or die" the rational conclusion is, no visitors.</p><p>Marianas trench has also been drilled and sampled. I remember hearing at one point scientists thought it might be possible to sample the upper mantle.</p><p>http://www.smarterscience.net/marianatrenchgeology.html </p><p> </p><p><img src="file:///C:/DOCUME%7E1/COMPAQ%7E1/LOCALS%7E1/Temp/moz-screenshot.jpg" alt="" /><br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/10/13/6a2c7730-2b60-4d2b-9d3f-e2308aad7d72.Medium.png" alt="" /></p> <div class="Discussion_UserSignature"> <p> </p><p> <font color="#0000ff"> www.watchnasatv.com</font></p><p> ONE PERCENT FOR NASA! </p> </div>