Subject
Travel
Botany History
2
Wildlife conservation
2
Zoology
2
Alaska Discovery and exploration
1
Antarctica
1
Antarctica Discovery and exploration
1
Botanical illustration History
1
Botanists
1
Burma Description and travel
1
Colorado Description and travel
1
Earth (Planet) History
1
Ecuador Description and travel
1
Geodynamics History
1
Geology
1
Geology History
1
Greece Description and travel
1
Historical geology
1
Knowledge and learning
1
Middle East Description and travel
1
Natural history
1
Naturalists
1
Nuclear physicists
1
Particles (Nuclear physics)
1
Penguins
1
Penguins Behavior
1
Russians History
1
Sexual behavior in animals
1
Subsidences (Earth movements)
1
Voyages around the world
1
Whales
1
Whaling
1
Wild animal collecting
1
Zoological specimens Collection and preservation
1