About the Authors

John P. Swensen

john.swensen@yale.edu

Affiliation Mechanical Engineering and Materials Science, School of Engineering and Applied Science, Yale University, New Haven, Connecticut, United States of America

Aaron M. Dollar

Affiliation Mechanical Engineering and Materials Science, School of Engineering and Applied Science, Yale University, New Haven, Connecticut, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JPS AMD. Performed the experiments: JPS. Analyzed the data: JPS. Wrote the paper: JPS AMD.