Related by context. Frequent words. (Click for all words.) 52 chimpanzees 48 Chimpanzee 48 primate species 47 African savanna 47 chimps 46 Chimpanzees 46 nonhuman primates 46 capuchin monkeys 46 primates 45 P. falciparum 45 melanogaster 45 Frans de Waal 45 sexual dimorphism 45 primatologist 45 simian immunodeficiency virus 44 marine iguanas 44 Indohyus 44 marine invertebrates 44 palaeontologist 44 mole rats 44 vertebrate animals 44 primate 43 mammal species 43 coelacanth 43 spider monkeys 43 ground sloths 43 Magellanic penguins 43 breeding colony 43 western lowland gorillas 43 bonobos 43 okapi 43 dinosaur fossil 43 feathered dinosaurs 43 Ardipithecus ramidus 43 Late Cretaceous 42 endangered mountain gorillas 42 carnivorous dinosaur 42 palaeontology 42 Palaeontology 42 palaeontologists 42 crocodilian 42 anthropoid 42 mammalian species 42 capuchins 42 tapirs 42 giant tortoises 42 Humboldt penguins 42 cichlids 42 chimpanzee 42 vertebrate species 42 Great Apes 42 Senegal 42 mammals reptiles 42 paleoanthropologist 41 hominid 41 Great Ape 41 squirrel monkeys 41 African savannah 41 Nigersaurus 41 mammals 41 primatologists 41 cowbirds 41 frogs toads 41 fossilized remains 41 giant tortoise 41 theropods 41 H. erectus 41 zebra finches 41 leatherback turtles 41 marmosets 40 mammal 40 T. gondii 40 Australopithecus afarensis 40 rhesus macaques 40 rhesus monkeys 40 endangered primates 40 baboons 40 taxon 40 sauropod 40 toothed whales 40 afarensis 40 parasitic worm 40 hornbills 40 ant species 40 crocodilians 40 lions elephants 40 Apatosaurus 40 clouded leopards 40 rhinoceroses 40 snakes lizards 40 trilobites 40 lemur 39 fruit fly Drosophila 39 monkeys apes 39 mongooses 39 apes 39 pterosaur 39 fossils 39 lizards 39 Gila monsters 39 humans