Content with the tag: “australia”
-
Oxygen in Earth's Atmosphere Before Great Oxidation Event
NAI’s Astrobiology Drilling Program supported researchers in 2004 to obtain subsurface core samples from the Hamersley Basin in Western Australia. Those samples, representing the time just before the Great Oxidation Event, have been analyzed, and two research papers detailing the results (Anbar, et al. and Kaufman, et al.) appear in September 28, 2007 issue of Science. Both groups found unexpected, correlated changes that reveal the presence of small but significant amounts of O2 in the environment 2.5 billion years...
September 27, 2007 / Posted by: Shige Abe
-
Photosynthesis in the late Archean
A new study on carbon isotopes in sedimentary rocks from Western Australia by researchers from NAI’s Penn State and Carnegie Institution of Washington Teams supports the idea that small, shallow pools of water containing photosynthetic microbes existed on the early Earth ~ 2.72 Gya, about 300 million years before the rise of oxygen in the atmosphere. Their findings suggest a “global-scale expansion” of these habitats, and a progression away from anaerobic ecosystems and toward photosynthetic communities before the oxygenation...
October 16, 2006 / Posted by: Shige Abe
-
A Mild, Habitable Hadean?
NAI’s Mark Harrison of the UCLA team co-authored a study published in this week’s Science describing a titanium thermometer technique used to measure the temperature at which ancient zircons from the Jack Hills in Western Australia formed. The results paint a mild picture of the Hadean, complete with an atmosphere and liquid water.
May 9, 2005 / Posted by: Shige Abe
- 2008 aas abiogenic abscicon aerobic akila akilia island algae allan hills alpha centauri alvin amase american astronomical society amino acids anaerobic antarctica antartica antennas archaea archea archean arctic area 9 aromatic astrobiology drilling program astrobiology journal astrobiotechnology astrochemistry astronaut astronomical journal astrophysical journal astrophysical journal letters atacama atlantis atmosphere atmospheric chemistry australia australian centre for astrobiology auv awards axis bacteria bacteriorhodopsin binaries biofilms biomarkers biome biosignatures books britian brown dwarfs cambrian canada canyon canyons carbonate rocks carbonates carbon dioxide cassini cells chemostratigraphy chile chimpanzee china chip chiral citations cnn collaborative technology colors comet comets comics complex life conference core accretion cyanobacteria dance data databases ddf depthx director diversity dna dolphin drilling dust dwarf star ea early earth early mars earth earth and planetary science letters earth and planetary science letters (journal) education electronic arts enceladus encyclopedia of life endourance endurance england enzyme enzymes erosion esa ethane eukaryotes europa evolution evolution and environment exobiology exoplanet exoplanets expose express extremeophiles extremephiles extremophiles fiction flood fossils frogs funding fungi fuse future of life galileo games ganymede gas gas giants geobiology (journal) geology (journal) geysers giant planets glacier glaciers great oxidation even great oxidation event greenland gsfc guerrero negro habitability habitable planets habitable zone habitablity in the universe hadean hawaii hawaii team high angular resolution homochirality hubble human hydrocarbons hydrogen hydrogen peroxide hydrogen sulfide hydrothermal vent hydrothermal vents hyperion hyperthermophilic ice iceland idaho information technology instruments international space station iron isotope isotopes iss jack hills journal:earth journal: journal of geophysical research journal of bacteriology journal of the american chemical society jpl jupiter kepler laboratory lakes lassen left-handed lefty life and environment life elsewhere in the universe life in our solar system lipids liquid magnet magnets maps marine ecology mars mars express mars global surveyor mars orbiter mars reconnaissance orbiter mars rovers martian atmosphere martian oceans mass extinctions m dwarf stars membranes mercury messenger meteorites meteors meterite meterorites methane methanogen mexico microbes microbialite microbialites microbial life microbial mats microbiology microlensing microscopy mirs missions mojave molecular biology and evolution (journal) molybdenum moon moon and planets moons mro m star m stars murchison music nai arc team nai asu team nai berkeley team nai cal team nai ciw team nai cub team nai gsfc team nai har team nai hawaii team nai iptai team nai mbl team nai minority institution research support nai mit team nai montana team nai msu team nai postdoctoral fellow nai psu team nai seti team nai ua team nai ucb team nai ucla team nai uh team nai uri team nai uw team nai virus focus group nai vpl at jpl nai vpl at jpl team nai vpl at uw team nai wisconsin team nanoparticles nasa arc nasa jpl nasa tv nature (journal) near near earth asteroid rendezvous neoproterozoic neteritics and planetary science (journal) new horizons new york times nitrogen fixation npr nucleic acids obituary ocean ocean-bottom ocean drilling program oceans odyssey opportunity origin of life origins of life oven ovens oxygen ozone pah paleoproterozoic parachute pavilion lake pbs perchlorate permafrost permian philosophy phoenix phoenix mission phosphorus photosynthesis planetary protection planet formation planet migration planets plankton plants pnas poles poster pre–main‐sequence precambrian precambrian research (journal) primer probe proceedings of the national academy of sciences (journal) prokaryotes propane proteins proteobacteria proterozoic protoplanetary disk pyruvic acid quartet radio raman spectroscopy reptiles rio tinto rise of oxygen robatic robot robotic robotics robots rover rovers rrna salt samples saturn science (journal) scientific american (journal) second life segan medal serpentinization shoemaker signatures of life sinkhole snowball earth soil solar panel south africa space shuttle space telescope science institute spitzer space telescope spore stardust sterols subsurface sulfate reduction sulfides sulfur sun super earths supergiant star tega teraforming terrestrial terrestrial planet formation terrestrial planets thermal and evolved-gas analyzer thermometer time titan titanium tweets twitter uk underwater united kingdom vegetation venus video viking viruses volcanoes voyager wall street journal water web 2.0 website websites wet-chemistry workbook yeast yellowstone zircon zircons zoe
