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![Ray Arvidson](https://source.wustl.edu/app/uploads/2023/07/Arvidson_760-300x300.jpg)
Raymond Arvidson
James S. McDonnell Distinguished University Professor Emeritus, Department of Earth and Planetary Sciences
![Bradley Jolliff](https://source.wustl.edu/app/uploads/2020/08/Brad-Jolliff-760-300x300.jpg)
Bradley Jolliff
Scott Rudolph Professor of Earth and Planetary Sciences, Director of the McDonnell Center for the Space Sciences