Rare 2.5 billion-year-old rocks reveal a hot spot of sulfur-breathing life

(PRWEB) November 06, 2014 Wriggle your toes in a marsh’s mucky bottom sediment and you’ll probably inhale a rotten egg smell, the distinctive odor of hydrogen sulfide gas. That’s the biochemical signature of sulfur-using bacteria, one of Earth’s most ancient and widespread life forms. Among scientists who study the early history of our 4.5 […]