About the Authors
- Bruce S. Lieberman
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*To whom correspondence should be addressed. E-mail: blieber@ku.edu
Affiliation Department of Geology and Natural History Museum, University of Kansas, Lawrence, Kansas, United States of America
- Adrian L. Melott
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Affiliation Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: BL. Analyzed the data: AM. Wrote the paper: BL AM.