In support of xeno-optimism.  [electronic resource] 

 -  Nature  Feb 2003 
 - 769 p.  digital 
<br/><br/> Publication Type: Comment; Editorial 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/421769b  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extraterrestrial Environment<br/>Life<br/>Research--economics