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Content with the tag: “astrobiology drilling program”
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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
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Earth's Ancient Atmosphere: the Rise of Oxygen
Most geologists agree that Earth’s atmosphere was oxygen-free until 2.4 billion years ago. But the latest research from NAI’s Pennsylvania State University team provides new evidence for alternative viewpoints. Ohmoto et al have published their latest results in this week’s Nature. Ohmoto’s team took samples from western Australia as a part of NAI’s Astrobiology Drilling Program.
August 23, 2006 / Posted by: Shige Abe
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