How can microbes from different eras be related in the modern world?

Details How can microbes from different eras be related in the modern world? How can microbes from different eras be related in the modern world?

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....1389v&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #1389

Biology

Scientific paper

During the last ten years credible reports of the isolation of live microbes from ancient materials have appeared in major scientific journals. These claims have generally been supported by several lines of evidence. These include establishing the age of the source materials, documentation of surface sterilization prior to extraction and clear evidence of the isolation of the sample within the rock since the original deposition. The fact that these reports have described living microbes that appear very similar to putatively modern organisms rather than describing extinct fossils has created two competing scientific camps. On one side are those who accept the data and therefore probable ages of the isolates. Arrayed in opposition, are those who believe that no macromolecule could survive these long ages without repair and that the close molecular relationships indicate recent contamination by unknown or undetected events. These two positions have been nearly impossible to reconcile. However recent additional evidence indicates that the source crystals were isolated, that key macromolecules (i.e. DNA) are stable for millions of years inside halite crystals and that the overall genomes differ even though core genes are similar. This presentation will trace these developments and discuss the implications for evolution, geomicrobiology and astrobiology.

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