Related by context. Frequent words. (Click for all words.) 68 primatologist Jane Goodall 62 wildlife conservationist 60 Jane Goodall 57 Richard Leakey 57 primatologist 57 Dian Fossey 54 David Attenborough 54 conservationist 54 Jeff Corwin 53 Chris Packham 52 primatologists 52 Zoologist 52 Jane Goodall Institute 51 zoologist 51 Sir Peter Ustinov 50 Frans de Waal 50 Actor Don Cheadle 49 botanist 49 naturalist 49 Sylvia Earle 49 Actress Sigourney Weaver 49 playwright novelist 48 Philippe Cousteau 48 WildlifeDirect 48 Yann Arthus Bertrand 48 novelist essayist 47 Graça Machel 47 paleobiologist 47 ethnobotanist 47 tigers leopards 47 ACCLAIMED 47 Wangari Maathai 47 Nobel prizewinner 47 winner Wangari Maathai 47 Rita Colwell 47 Geoffrey Marcy 46 internationally acclaimed 46 wildlife 46 feminist Gloria Steinem 46 playwright screenwriter 46 Walter Pidgeon 46 environmentalist 46 Mongabay 46 kipunji 46 astronomer Carl Sagan 46 mongabay.com 46 Clyde Butcher 46 herpetologist 46 mycologist 46 endangered primates 46 Actress Marlee Matlin 45 scientist Stephen Hawking 45 wildlife conservation 45 Internationally renowned 45 Dian Fossey Gorilla 45 Guggenheim Fellow 45 wildlife ecologist 45 renowned 45 Cheetah Conservation 45 Louis Leakey 45 RENOWNED 45 Wildlife Conservation Society 44 Acclaimed 44 Nobel laureate Toni Morrison 44 endangered mountain gorillas 44 endangered mammal 44 Buglife 44 conservationists 44 snow leopards 44 Project Nim 44 avid bird watcher 44 internationally renown 44 Kenyan environmentalist Wangari 44 documentary narrated 44 ecologist 44 Stephanie Boyles 44 Great Apes 44 Botanist 44 zoologists 44 biological anthropologist 44 frogs salamanders 44 Today Birthdays Author 44 Jonathon Porritt 44 herpetologists 44 Chimpanzee 44 ornithologist 44 actor Don Cheadle 44 Jacques Yves Cousteau 43 Bill Oddie 43 internationally renowned 43 Great Ape 43 Jean Michel Cousteau 43 Sir Ian McKellan 43 amateur naturalist 43 Renowned 43 Robert Redford 43 evolutionary genetics 43 Sumatran Tiger 43 journal Climatic Change 43 Twycross Zoo 43 endangered orangutans