Related by context. Frequent words. (Click for all words.) 66 bipedal 65 forelimbs 64 biped 62 tetrapod 61 Diplodocus 60 placental mammals 60 theropod 60 bipedalism 59 forelimb 58 Indohyus 58 afarensis 57 herbivorous 56 theropods 56 crocodilians 56 locomotion 55 sauropods 55 hind limbs 55 unicellular 54 bipeds 54 inchworm 54 quadruped 53 Brachiosaurus 53 hominins 53 velociraptor 53 tyrannosaur 53 pectoral fins 53 quadrupeds 53 hadrosaur 53 humanlike 53 H. erectus 53 herbivore 52 carnivorous dinosaurs 52 convergent evolution 52 tetrapods 52 humans 52 morphologically 52 subfamily 52 mandibles 52 Australopithecus 52 humanoid 52 flagellum 52 locomotor 52 vertebrate animals 52 velociraptors 52 brontosaurus 52 mouthparts 52 vertebrate 52 exoskeletons 52 Ardipithecus ramidus 52 Ardipithecus 52 Tiktaalik 51 sexual dimorphism 51 hominin 51 nematode worms 51 flagella 51 multicellular organisms 51 featherless 51 fruit fly Drosophila 51 sauropod 51 Archaeopteryx 51 Caenorhabditis elegans 51 mammalian 51 feathered dinosaurs 51 evolutionarily 51 Nigersaurus 51 genus Homo 51 pterosaur 50 sea anemone 50 nanomachines 50 tyrannosaurus rex 50 toothed whales 50 triceratops 50 hominid 50 mammals 50 LB1 50 single celled organisms 50 Columbian mammoth 50 upright posture 50 biological molecules 50 birdlike 49 multicellular 49 anthropoids 49 webbed feet 49 African savanna 49 slime mold 49 Homo sapiens 49 mitochondrial genome 49 platypuses 49 melanogaster 49 pterodactyls 49 nonhuman primates 49 pterosaurs 49 ground sloths 49 prokaryotes 49 hominids 49 Allosaurus 49 cuboid 49 vertebrates 49 Homo erectus 49 Neandertal 48 arthropod