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Climate Visualization
Fluorescence micrographs of cyanobacteria. About 2 billions years ago, cyanobacteria –“ oxygen-producing photosynthetic prokaryotes that used to be called blue-green algae –“ were responsible for launching the process that increased the concentration of atmospheric oxygen from less than 1 percent to about 20 percent today, making possible the evolution of humans and other animals. Credit: Mary Sarcina University College London
01/14/09

 



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