Small oxygen jump in atmosphere helped enable animals take first breaths

23 julio 2015

Measurements of iron speciation in ancient rocks were used to construct the chemistry of ancient oceans. Analysis suggests that it took less oxygen than previously thought to trigger the appearance of complicated life forms.img src=»http://feeds.feedburner.com/~r/sciencedaily/~4/UxF7vz3ziI8″ height=»1″ width=»1″ alt=»»/
http://feeds.sciencedaily.com/~r/sciencedaily/~3/UxF7vz3ziI8/150723125615.htm

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