The imprints of raindrops preserved in 2.7bn-year-old rock are being used to figure out what the atmosphere was like on the early Earth.
[url=http://www.bbc.co.uk/news/science-environment-20575250]More...[/url]
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The imprints of raindrops preserved in 2.7bn-year-old rock are being used to figure out what the atmosphere was like on the early Earth.
[url=http://www.bbc.co.uk/news/science-environment-20575250]More...[/url]