Topic
Earth-Surface Processes
Oceanography
14
General Earth and Planetary Sciences
12
Paleontology
9
Ecology, Evolution, Behavior and Systematics
8
Arts and Humanities (miscellaneous)
6
General Engineering
6
General Environmental Science
6
Soil Science
6
Ecology
4
Geography, Planning and Development
4
Global and Planetary Change
4
Geophysics
3
Archeology
2
Behavior and Systematics
2
Evolution
2
Geography: Geosciences
1
Palaeontology
1