"I'm a high school student in Pakistan. I just want to know the weight of an astrobiologist in space if his/her weight is 80 kg on earth."
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Oxygen in Earth's Atmosphere Before Great Oxidation Event
September 28, 2007 / Posted by: Shige Abe
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 ago, ~50-100 milion years before the Great Oxidation Event, and a shift from lower O2 abundance prior to that time.
Source: [Link]
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