About the Authors
- Erik E Cordes, Katriona Shea, Charles R Fisher
- Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Michael A Arthur
- Geosciences Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Rolf S Arvidson
- Department of Earth Science, Rice University, Houston, Texas, United States of America
The authors have declared that no competing interests exist.
EEC, MAA, and CRF conceived and designed the experiments. EEC performed the experiments and analyzed the data. KS and RSA contributed reagents/materials/analysis tools. EEC, MAA, KS, and CRF wrote the paper.