1. Departmentof Geographical Sciences, University of Maryland, College Park, MD, USA
2. University of Minnesota—Twin Cities, St. Paul, MN, USA
3. Purdue University, West Lafayette, IN, USA
4. Hopkins Odyssey Program, Baltimore, MD, USA
5. Forest Sciences Department, Colorado State University, Fort Collins, CO, USA
6. Australian National University, Canberra, ACT, Australia
7. Science Writer, Science Systems and Application Inc., Lanham, MD, USA
8. NASA Goddard Space Flight Center, Greenbelt, MD, USA
9. Global Science and Technology Inc., Greenbelt, MD, USA