About the Authors
Department of Evolution, Ecology & Organismal Biology, The Ohio State University, Columbus, Ohio, United States of America
Antarctic Geological Drilling Science Management Office, University of Nebraska-Lincoln, Lincoln, Nebraska, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MD FR. Performed the experiments: MD. Analyzed the data: MD. Contributed reagents/materials/analysis tools: FR RZ. Wrote the manuscript: MD FR.