Chemical analysis of ancient rocks reveals earliest record yet of Earth’s atmosphere: Isotopic memory of atmospheric persistence

14 enero 2015

Chemical analysis of some of the world’s oldest rocks has provided the earliest record yet of Earth’s atmosphere. The results show that the air 4 billion years ago was very similar to that more than a billion years later, when the atmosphere — though it likely would have been lethal to oxygen-dependent humans — supported a thriving microbial biosphere that ultimately gave rise to the diversity of life on Earth today.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/tW8b2zjko0c/150114115247.htm

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