About the Authors

William J. Brazelton

braz@uw.edu

Affiliation School of Oceanography and Center for Astrobiology and Early Evolution, University of Washington, Seattle, Washington, United States of America

John A. Baross

Affiliation School of Oceanography and Center for Astrobiology and Early Evolution, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WJB JB. Performed the experiments: WJB. Analyzed the data: WJB. Wrote the paper: WJB JB.