Chemical evidence paved way for discovery of early life
Excerpt from the August 1, 1964, issue of Science News Letter
Clues to Life’s Origin — Chemical clues to the origin of life have been found in billion-year-old rocks from Michigan…. Drs. Barghoorn, Schopf and Meinschein found porphyrins related to chlorophyll and hemoglobin, microfossils and optically active hydrocarbons in shale from the Nonesuch formation….