September 15, 2009
Timing Oxygen

Scientists have announced the discovery that Earth seems to have become free-oxygen rich much earlier than previously thought. The findings are, of course, controversial, and even the authors of the study admit they're not quite sure what to make of the data. Chemistry is hard enough when it's happening in the lab, it's no wonder trying to piece together what happened some 2.5 billion years ago is quite a bit more difficult.

Posted by scott at September 15, 2009 08:23 PM

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