From a University of Waterloo news release: Published in the April 7 issue of Science Express, the online edition of Science Magazine, the simulation study concludes that traditional models estimating hydrogen escape from Earth’s atmosphere several billions of years ago are flawed. The new study indicates that up to 40 percent of the early atmosphere was hydrogen, implying a more favourable climate for the production of pre-biotic organic compounds like amino acids, and ultimately, life. [...] Earth was formed about 4.6 billion years ago, and geologic evidence indicates that life may have begun on Earth roughly a billion years later.”
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