Related by context. Frequent words. (Click for all words.) 63 = rectangle 59 mosasaurs 58 monotremes 57 carnivorous dinosaurs 56 plesiosaurs 55 marine reptiles 54 Extinctions 54 dinosaurs 54 theropods 54 ichthyosaurs 54 feathered dinosaurs 54 Gigantoraptor 54 rheas 53 Neotropical 53 Vertebrate 53 Pterosaurs 53 Ventastega 53 horned dinosaurs 53 faunas 52 Homo antecessor 52 theropod 52 Raptorex 52 allosaurus 52 frogs lizards 52 Yangtze River dolphin 52 insectivores 52 Allosaurus 52 multicellular animals 52 invertebrate animals 51 sauropods 51 peccary 51 inexplicable gaps 51 Indohyus 51 seals sea lions 51 Scott Shalaway 51 Diplodocus 51 fossilized remains 51 hominid species 51 mammals 51 coevolution 51 frogs toads 50 theropod dinosaurs 50 ground sloths 50 astronomer lecturer 50 transmissible spongiform encephalopathies 50 predatory dinosaurs 50 australopithecines 50 vertebrate animals 50 Torosaurus 50 By Tudor Vieru 50 paleoanthropologists 50 Science Medline 50 Mammals 50 unicellular 50 phyla 50 single celled organisms 50 Donald Johanson 50 Apatosaurus 50 placental mammals 50 Vertebrate Zoology 50 saber tooth tigers 49 dinosaur species 49 saber toothed tigers 49 paleobiology 49 reptiles amphibians 49 single celled 49 snakes lizards 49 paleobiologist 49 macroevolution 49 echinoderms 49 Ardipithecus ramidus 49 feathered dinosaur 49 Irrawaddy dolphin 49 horned dinosaur 49 amphibians reptiles 49 short tailed albatross 49 Late Triassic 49 By DIEDTRA HENDERSON 49 eukaryote 49 triceratops 49 Darwinius 48 DIARY Federal Reserve 48 Darwin finches 48 Paranthropus 48 Erieside Ave 48 aquatic mammals 48 carnivorous dinosaur 48 marine invertebrates 48 crurotarsans 48 reproduce asexually 48 Palaeontologists 48 herbivorous 48 Herpetologists 48 tapirs 48 Cretaceous Period 48 multicellular organism 48 anthropoids 48 frogs salamanders 48 Sumatran orangutans 48 Biogeography 48 brachiosaurus