"Hi! I would like to know what would it takes to reverse earth's rotation, and what would be the consequences for life on earth if that happens? "
Content with the tag: “early life”
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Hydrogenase Active Sites and the Origin of Life
Members of NAI’s Team at Montana State University have provided a Perspectives piece in Dalton Transactions reviewing the organo-metallic chemistry of the active sites of hydrogenase enzymes. Since hydrogen metabolism is presumed to be an early feature in the energetics of life, and hydrogen metabolizing organisms can be traced very early in molecular phylogeny, studying the metal clusters at hydrogenase active sites can reveal potential conditions in which early life arose. Efforts in this field also could have significant impacts on alternative and renewable energy solutions.
April 6, 2009 / Posted by: Daniella Scalice
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Oldest Evidence for Animals in the Fossil Record
Detected through their molecular remains, fossils of early sponges have been observed in ancient rocks in Oman. The fossils occur in strata that underlie a cap carbonate dated at >635 million years ago. This discovery suggests that shallow waters contained dissolved oxygen in concentrations sufficient to support early animal life at least 100 million years before the Cambrian explosion. Members of NAI’s MIT team led the effort, and publish their findings in the current issue of Nature.
February 4, 2009 / Posted by: Daniella Scalice
- 16srrna 17p 79 ceti 85p 1999 1999 and 2000 2000 2008 aas abiogenic abiogenic methane abiotic abiotic synthesis abscicon abundances acid mine drainage acidophile activity adaptive optics adenosine triphosphate aerobic aerosol aerosols akila akilia island algae algal-sarcodine photosymbiotic relationships algal cultures alh84001 alien life allan hills alpha centauri altiplano alvin amase american astronomical society american type culture collection amino acid amino acids ammonia ammonia formation ammonium amorphization anaerobic analog environments ancient earth ancient pathways. andes and k content anoxia biomarker permian cambrian terrestrial paleosol oxygen archean proterozoic biogeochemistry extinction euxinia hydrogen sulfide sulfur bacteria anoxic environment anoxygenic photosynthesis antarctica antarctic endolithic communities antartic antartica antennas aqueous alteration archae archaea archaeoglobus archea archean arctic area 9 arid and semi-arid soils aromatic asap (astrobiology sample analysis program) aspartic acid asteroid asteroid 10537 (1991 ry16) asteroids asteroids--dynamics astid astrobiology astrobiology (journal) astrobiology drilling program astrobiology journal astrobiotechnology astrochemistry astronaut astronomical journal astrophysical journal astrophysical journal letters astrophysics atacama atacama desert atlantis atmosphere atmosphere escape atmosphere evolution atmospheric airglow atmospheric carbon dioxide atmospheric chemistry atmospheric evolution atmospheric formation atmospheric photochemistry atp-binding proteins australia australian centre for astrobiology autotrophic auv avhrr database awards axial volcano subsurface fluids axis bacteria bacterial metagenomes bacteriorhodopsin banded iron formations basaltic basaltic lava basalt tuff basalt weathering binaries binaries: spectroscopic bioastronomy biochemical adaption biochemistry bioenergetics biofilms biogenic mineral structure biogenic molecules biogeochemical cycles 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endosymbiosis endourance endurance england environments enzyme enzymes eoarchean epimerases epoxi erosion esa ethane eubacteria eukaryote eukaryote evolution eukaryotes eukaryotic-specific primers eukaryotic microbial community europa evaporation evaporite evolution evolution and environment exo-planetary systems exobiology exoplanet exoplanets exosolar planets expose express extra-solar planets extrasolar life extrasolar planet extrasolar planets extraterrestrial extraterrestrial life extreme conditions extreme environment extreme environments extreme life extremeophiles extremephiles extremophiles faint companion farmer fe fe isotopes femtochemistry fiction fieldwork in april of 1999 in the tinto river located in the huelva district of southwestern spain fingerprint fischer-tropsch catalysis flood fluorescence in situ hybridization focus group formation routes forward contamination fossil fossils fracture frogs functional genomics funding fungi fu orionis fuse future of life galaxies 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iron-sulfur minerals iron concentrations iron formation iron isotope fractionation iron oxide iron oxidizing bacteria iron reduction kinetics irons-sulfur surfaces iron spectromicroscopy irradation irradiation ir spectroscopy isomerases isotope isotopes isotopic fractionation iss issol jack hills jakoba incarcerata jakoba libera jakobids jarosite journal:earth journal: journal of geophysical research journal of bacteriology journal of the american chemical society jpl jupiter kbo kbo size distribution kepler key nutrient metals kuiper belt kuiper belt objects laboratory laboratory investigation laboratory science lake lakes landsat tm data laser laser desorption lassen lassen volcanic national park late accretion late bombardment ldn 673 left-handed lefty level of analysis lexen program life life and environment life elsewhere in the universe life in extreme life in our solar system life on mars light lightning li isotopes lipids liquid liquid chromatography mass spectrometry lithic 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