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    Paul du Chaillu, Anthropologist  
Paul Belloni du Chaillu was a French-American traveler and anthropologist. He became famous in the 1860s as the first modern outsider to confirm the existence of gorillas, and later the Pygmy people of central Africa. He later researched th...
 
    August Weismann, Evolutionary Biologist  
Friedrich Leopold August Weismann was a German evolutionary biologist. Ernst Mayr ranked him the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute a...
 
    Ernst Haeckel, German Naturalist  
Ernst Haeckel was an eminent German biologist, naturalist, philosopher, physician, professor and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms...
 
    John Muir, Father of the National Parks  
John Muir was a Scottish-American naturalist, author, and early advocate of preservation of wilderness in the United States. His letters, essays, and books telling of his adventures in nature, especially in the Sierra Nevada mountains of Ca...
 
    Hugo de Vries, Mutation Theory of Evolution  
Hugo Marie de Vries was a Dutch botanist and one of the first geneticists. He is known chiefly for suggesting the concept of genes, rediscovering the laws of heredity in the 1890s while unaware of Gregor Mendel's work, for introducing the t...
 
    Theodore Roosevelt, 26th Us President, 1901-1909  
Theodore Roosevelt is mostly remembered as the twenty-sixth President of the United States (1901-1909), but this astonishingly multifaceted man was a great many other things as well. In addition to holding elective office as a New York S...
 
    David Attenborough, English Naturalist  
Sir David Frederick Attenborough is an English broadcaster and naturalist. His career as the face and voice of natural history programmes has endured for 60 years. He is best known for writing and presenting the nine Life series, in conjunc...
 
    Dian Fossey, American Primatologist  
Dian Fossey was an American zoologist, primatologist, and anthropologist who undertook an extensive study of gorilla groups over a period of 18 years. She studied them daily in the mountain forests of Rwanda, initially encouraged to work th...
 
    Jane Goodall, British Primatologist  
Dame Jane Morris Goodall, is a British primatologist, ethologist, anthropologist, and UN Messenger of Peace. Considered to be the world's foremost expert on chimpanzees, Goodall is best known for her 45-year study of social and family inter...
 
       
         
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