From: eastside.erik@gmail.com   
   To: sci.bio.paleontology@googlegroups.com (sci.bio.paleontology)   
      
   Structured Abstract   
   INTRODUCTION   
   Microbial life dominates the biosphere, but a timescale of early   
   microbial evolution has proven elusive as a result of an inadequate   
   fossil record. The lack of maximum age calibrations—the earliest point   
   in time at which a given group might have emerged—is particularly   
   problematic. However, the geochemical record bears the imprint of   
   microbial metabolism through time, providing a complementary source of   
   information. A pivotal event in this history was the Great Oxidation   
   Event (GOE) ~2.43 to 2.33 billion years ago (Ga), which marked a   
   substantial increase in atmospheric oxygen. This transition, driven by   
   the evolution of cyanobacterial oxygenic photosynthesis and carbon   
   burial, transformed the biosphere from predominantly anoxic to oxic,   
   causing widespread adaptation to oxygen. In this study, we used the   
   temporal link between atmospheric oxygenation and the evolutionary   
   spread of aerobic metabolism to calibrate the phylogeny of the bacterial   
   domain.   
      
   https://www.science.org/doi/10.1126/science.adp1853   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)