Related by context. Frequent words. (Click for all words.) 65 theropod 63 Diplodocus 62 horned dinosaurs 61 ichthyosaur 60 baleen whale 60 Archaeopteryx 60 tetrapod 60 T.rex 60 placental mammals 59 Falcarius 59 vertebrate animals 59 Indohyus 59 theropods 59 carnivorous dinosaur 59 crocodilian 58 feathered dinosaurs 58 predatory dinosaurs 58 Xenopus 58 Gansus 58 mitochondrial genome 57 Raptorex 57 pterosaur 57 trilobite 57 Torosaurus 57 fossilized skull 57 carnivorous dinosaurs 56 tyrannosaur 56 toothed whales 56 crocodilians 56 mosasaur 56 phyla 55 theropod dinosaurs 55 braincase 55 sauropod 55 flatworm 55 sauropods 55 unicellular 55 subfamily 55 Chlamydomonas 55 plesiosaurs 55 host = document.location.host 55 T rex 54 By Laurie Kulikowski 54 Apatosaurus 54 opposable thumb 54 pipefish 54 marine invertebrates 54 hominid species 54 Albertosaurus 54 ammonites 54 echinoderms 54 marine reptiles 54 horned dinosaur 54 mammalian species 54 sea anemone 54 Tiktaalik 54 Brusatte 54 By HARVEY SIMPSON 54 Australopithecus 54 tyrannosaurus rex 53 A. afarensis 53 mammals 53 hominin 53 afarensis 53 Ardipithecus 53 tortoise shells 53 Ardipithecus ramidus 53 sexual dimorphism 53 H. floresiensis 53 zebra finch 53 apelike 53 saber toothed cat 53 vertebrate 53 prokaryotes 53 hadrosaur 53 trilobites 53 Gigantoraptor 53 peccary 53 Neandertal 53 Brachiosaurus 53 erectus 53 bony plates 53 mammal 52 Barn owls 52 T. gondii 52 Allosaurus 52 microcephalic 52 simian virus 52 giant tortoise 52 sea scorpion 52 hadrosaurs 52 LB1 52 primate evolution 52 melanosomes 52 lemur 52 Tyrannosaurus 52 daddy longlegs 52 mottled brown 52 hominins 52 By LOREN STEFFY 52 cartilaginous