Oxygen, Phosphorus and Early Life On Earth

[knocker]

Nov. 17, 2013 — Two billion years ago Earth system was recovering from perhaps the single-most profound modification of its surface environments: the oxygenation of the atmosphere and oceans. This led to a series of major changes in global biogeochemical cycles, as a team around Aivo Lepland of the Norwegian Geological Survey NGU reports in the latest online edition of Nature Geoscience.

 

 

http://www.sciencedaily.com/releases/2013/11/131117155502.htm

 

I don't know whether it's just me but I find these videos a tad annoying if informative.

 

http://www.youtube.com/watch?v=f8gh7snSDak