Planavsky, Noah J <br/><br/>
Earth history. Low mid-Proterozoic atmospheric oxygen levels and the delayed rise of animals.  [electronic resource] 

 -  Science (New York, N.Y.)  Oct 2014 
 - 635-8 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1095-9203 
<br/><br/><label>Standard No.: </label>10.1126/science.1258410  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Atmosphere--chemistry<br/>Biological Evolution<br/>Chromium Isotopes--chemistry<br/>Earth, Planet<br/>Geologic Sediments--chemistry<br/>Oxidation-Reduction<br/>Oxygen--analysis<br/>Paleontology