Related by context. Frequent words. (Click for all words.) 64 Homo sapiens 59 bipedalism 59 homo sapiens 58 hominins 58 hominids 58 carnivorous dinosaurs 57 Ardipithecus 57 hominid 57 Australopithecus 57 Neandertals 57 tyrannosaur 56 humans 56 Tiktaalik 56 herbivorous 56 multicellular organisms 55 Homo Sapiens 55 forelimbs 55 Homo erectus 55 genus Homo 55 trilobites 55 evolutionary 54 crocodilians 54 H. erectus 54 evolutionarily 53 arthropod 53 evolutionary adaptation 53 hunter gatherers 53 tyrannosaurs 53 theropod 53 bipeds 53 Neanderthals 53 dinosaurs 53 evolutionary biologists 53 sauropods 53 Neandertal 53 hominin 52 Homo habilis 52 theropods 52 marine reptiles 52 tetrapods 52 vertebrates 52 Archaeopteryx 52 herbivore 51 mammalian species 51 single celled organisms 51 Fruit flies 51 monkeys apes 51 hadrosaur 51 mammoths 50 anatomically modern 50 marine invertebrates 50 Cretaceous Period 50 ancients 50 biped 50 nonhuman primates 50 FOXP2 50 microbiome 50 multicellular 50 herbivores 50 naked mole rats 50 mammalian 50 courtship rituals 50 velociraptor 49 mammals 49 megafauna 49 neural circuitry 49 cave dwellers 49 prokaryotes 49 T. rex 49 arthropods 49 prehistory 49 vertebrate 49 Australopithecus afarensis 49 Cambrian explosion 49 hunter gatherer 48 African savanna 48 apes 48 vertebrate species 48 woolly mammoths 48 Neanderthal 48 morphologically 48 bipedal 48 dinos 48 Longrich 48 Beringia 48 asexual reproduction 48 ant species 48 Tyrannosaurus rex 48 Poinar 48 nocturnal creatures 48 fossils 48 moa 48 pterosaurs 48 prehistoric 47 chimpanzees 47 C. elegans 47 lifeforms 47 Fertile Crescent 47 ungulates 47 pterosaur 47 Brachiosaurus