Can identification of a fourth domain of life be made from sequence data alone, and could it be done on Mars?

@article{Poole2007CanIO,
  title={Can identification of a fourth domain of life be made from sequence data alone, and could it be done on Mars?},
  author={Anthony M. Poole and Eske Willerslev},
  journal={Astrobiology},
  year={2007},
  volume={7 5},
  pages={801-14}
}
A central question in astrobiology is whether life exists elsewhere in the universe. If so, is it related to Earth life? Technologies exist that enable identification of DNA- or RNA-based microbial life directly from environmental samples here on Earth. Such technologies could, in principle, be applied to the search for life elsewhere; indeed, efforts are underway to initiate such a search. However, surveying for nucleic acid-based life on other planets, if attempted, must be carried out with… CONTINUE READING