7 November 2014
Earth’s ancient oceans held much lower concentrations of sulfate — a key biological nutrient — than previously recognized, according to new research. The findings paint a new portrait of our planet’s early biosphere and primitive marine life. Organisms require sulfur as a nutrient, and it plays a central role in regulating atmospheric chemistry and global climate.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/NWc8qrPX8ek/141107091451.htm
