The reason for as well as the consequence of the cambrian explosion in animal evolution

@article{Ohno2009TheRF,
  title={The reason for as well as the consequence of the cambrian explosion in animal evolution},
  author={Susumu Ohno},
  journal={Journal of Molecular Evolution},
  year={2009},
  volume={44},
  pages={S23-S27}
}
  • S. Ohno
  • Published 2009
  • Biology
  • Journal of Molecular Evolution
The first 1 billion years of our 4.5-billion-year-old planet were extremely violent, chacarterized by constant meteorite bombardment. Therefore, it is with a great surprise that we note that cellular life flourished 3.5 billion years ago. It appears that the cellular life came into being as soon as the earth’s environment became hospitable. Because the main ingredient of the Archean sea was sodium bicarbonate, neither archeobacteria nor eubacteria but rather photosynthesizing organisms… 

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Of it, not above it