Alfred Wegener
Continental Drift Theory
Rachel Carson
Environmental Movement
Jane Goodall
Chimpanzee Research
Charles Lyell
Principles of Geology
Jacques Cousteau
Marine Conservation
Mary Anning
Fossil Discoveries
Carl Sagan
Planetary Science & Cosmos
Wangari Maathai
Green Belt Movement
Alexander von Humboldt
Biogeography
Marie Tharp
Ocean Floor Mapping
James Lovelock
Gaia Hypothesis
Sylvia Earle
Ocean Conservation
Eugene Shoemaker
Impact Crater Studies
Inge Lehmann
Earth's Inner Core Discovery
Milutin Milanković
Ice Age Cycles
Dian Fossey
Gorilla Research