Longstaff, Alan, <br/><br/>
Quest for a Living Universe. 
Alan Longstaff. 
 -  Astronomy,  2005. 
 - SIRS Enduring Issues 2006.  Article 48,  Science,  1522-3264; .
<br/><br/> Articles Contained in SIRS Enduring Issues 2006.  Originally Published: Quest for a Living Universe, April 2005; pp. 28-34. 
<br/><br/> "Will we recognize alien life if we stumble across it? Maybe not. It's highly unlikely, after all, that the cameras of our space probes will capture images of planetary surfaces covered with organisms, or the artifacts of intelligent life-forms. Chances are the evidence will be much more subtle: tantalizing spectral lines of biomolecules in the light from a distant earthlike world, or structures within rocks from another planet that are not of obvious geological (or even biological) origin." (ASTRONOMY) This article explains what is necessary for life and examines the possibility of alien life being present in the universe. 
<br/><br/><label>ISSN: </label>1522-3264; 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extrasolar planets<br/>Jupiter (Planet)--Satellites<br/>Life--Origin<br/>Life on other planets<br/>Marine organisms<br/>Solar system
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Mars (Planet)--Atmosphere
<br/><br/><label>LC Class. No.: </label>AC1.S5 
<br/><br/><label>Dewey Class. No.: </label>050