Origins of life: Common ancestry put to the test

@article{Steel2010OriginsOL,
  title={Origins of life: Common ancestry put to the test},
  author={Mike A. Steel and David Penny},
  journal={Nature},
  year={2010},
  volume={465},
  pages={168-169}
}
The question of whether or not all life on Earth has an ultimate common origin is a subtle one, complicated by the phenomenon of lateral gene transfer. It has now been tackled with a formal statistical analysis. Universal common ancestry (UCA), the idea that all terrestrial life is genetically related, from some “warm little pond” as Darwin put it, has become central to modern evolutionary theory. The classic evidence for UCA is extensive, but largely qualitative, and the theory is rarely… 
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