* Scientists propose a new mechanism by which oxygen may have first built up in the atmosphere Phys.org
* Oxidative metabolisms catalyzed Earth's oxygenation Nature.com
* Comet 67P Harbors Ancient Molecules Of Solar System’s Earliest Primordial Oxygen Forbes
* Comet 67P's abundant oxygen more of an illusion, new study suggests Phys.org
* Microbes and minerals may have set off Earth's oxygenation MIT News
* View Full Coverage on Google News
http://dlvr.it/SLhz3p
