Sleep, Norman H <br/><br/>
Life: asteroid target, witness from the early Earth, and ubiquitous effect on global geology.  [electronic resource] 

 -  Astrobiology  Dec 2012 
 - 1163-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1557-8070 
<br/><br/><label>Standard No.: </label>10.1089/ast.2012.1031  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth, Planet<br/>Evolution, Chemical<br/>Geological Phenomena<br/>Humans<br/>Minor Planets