Search results for "Panspermia"

showing 2 items of 2 documents

On the astrobiological relevance of viruses in extraterrestrial ecosystems

2009

AbstractViruses are the dominant form of genetically reproducing entities on Earth. Yet, viruses are mostly neglected in the context of astrobiology due to their non-living nature. In this discussion it is considered whether viruses are likely to be transferred within bacterial endospores to other planetary bodies through lithopanspermia. Interestingly, it seems possible that ecosystems of panspermial origin might yield biospheres in which viruses are absent. The evolutionary pathway of life in these systems might differ significantly from the path observed on Earth. We hypothesize that the difference in the two potential ways for the emergence of life, those being panspermial or local orig…

Physics and Astronomy (miscellaneous)Space and Planetary ScienceEcologyPanspermiaExtraterrestrial lifeEarth and Planetary Sciences (miscellaneous)Context (language use)EcosystemBiologyEcology Evolution Behavior and SystematicsAstrobiologyInternational Journal of Astrobiology
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Desiccation by Exposure to Space Vacuum or Extremely Dry Deserts: Effect on Microorganisms

2003

General Limits of Growth at Low Water Activities Dormant Life Molecular Events Induced by Desiccation Survival at Extremely Low Water Activity Survival Under Extremely Dry Desert Conditions Keywords: anhydrobiosis; desiccation; extreme environments; freeze-drying; panspermia thesis; space: survival in space; space vacuum; water activity

Water activityAgronomyPanspermiaMicroorganismfungiBotanyExtreme environmentBiologyDesiccationCryptobiosis
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