Article PubMed
Proceedings of the National Academy of Sciences of the United States of America  (2015)

Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis.

Schopf, J William; Kudryavtsev, Anatoliy B; Walter, Malcolm R; Van Kranendonk, Martin J; Williford, Kenneth H; Kozdon, Reinhard; Valley, John W; Gallardo, Victor A; Espinoza, Carola; Flannery, David T