Related by context. Frequent words. (Click for all words.) 54 Wangari Maathai 54 David Attenborough 49 Archbishop Desmond Tutu 46 zoologist 45 Desmond Tutu 45 Earthwatch 45 Charles Darwin 44 Maya Angelou 43 Gloria Steinem 43 Albert Schweitzer 43 Maathai 43 Richard Dawkins 43 Chimpanzee 43 conservationist 42 chimpanzees 42 bonobos 41 primate 41 Jacques Cousteau 41 Elie Wiesel 41 Jean Michel Cousteau 41 bonobo 41 National Geographic 40 Archbishop Tutu 40 naturalist 40 mountain gorillas 40 Kofi Annan 40 cheetah 40 Galapagos Islands 40 Carl Sagan 39 Chimpanzees 39 naturalists 39 Animal Planet 39 Queen Noor 39 Norman Borlaug 39 Oprah Winfrey 39 Harry Belafonte 39 Wildlife Conservation Society 39 Wright Edelman 39 Aldo Leopold 38 Oprah 38 chimps 38 Harriet Tubman 38 environmentalist 38 palaeontologist 38 lemurs 38 Mother Teresa 38 Planet Earth 38 zoologists 37 primates 37 chimpanzee 37 herpetologist 37 Crocodile Hunter 37 poet Maya Angelou 37 Deepak Chopra 37 Bindi Irwin 37 Mother Theresa 37 Dorothy Height 37 gorillas 37 Graca Machel 37 Stephen Hawking 37 Bear Grylls 37 Annie Lennox 37 Greg Mortenson 37 paleontologist 37 Ted Turner 37 evolutionary biologist 36 Primate 36 Melinda Gates 36 Fossey 36 Angelique Kidjo 36 Studs Terkel 36 Biodiversity 36 wildlife conservation 36 Leakey 36 Germaine Greer 36 Steve Irwin 36 conservation 36 cheetahs 36 Natural History Museum 35 chimp 35 meerkats 35 Simon Wiesenthal 35 Harriet Beecher Stowe 35 apes 35 lemur 35 Ecologist 35 botanist 35 Bianca Jagger 35 Tasmanian Devil 35 Shirin Ebadi 35 Helen Keller 35 Serengeti 35 Florence Nightingale 35 Bertrand Russell 35 Jeffrey Sachs 35 Ray Kurzweil 35 Heifer International 35 Michael Crichton 35 Bill McKibben 35 Nature Conservancy 35 Gaylord Nelson