Related by context. Frequent words. (Click for all words.) 62 baleen whale 61 horned dinosaurs 59 temperate forests 58 mammals 58 feathered dinosaurs 57 Brusatte 57 arthropod 57 marine reptiles 57 marine invertebrates 55 braincase 55 ecological niches 55 crocodilians 55 gastropods 55 carnivorous dinosaurs 55 H. sapiens 55 T.rex 54 predatory dinosaurs 54 theropod dinosaurs 54 theropod 54 vertebrate animals 54 terrestrial ecosystems 54 Falcarius 54 Early Cretaceous 54 plesiosaurs 54 placental mammals 53 diatom 53 trilobite 53 flatworm 53 methanogens 53 arthropods 53 biota 53 amphipods 53 fossils 53 planktonic 53 faunal 53 Titanoboa 53 preserved fossils 53 species 53 ammonites 52 theropods 52 Scientists theorize 52 hominid species 52 avian species 52 killifish 52 dinosaur species 52 slime molds 52 vertebrate 52 trilobites 52 mammal species 52 refugia 52 crocodilian 52 foraminifera 52 Neandertal 52 relict 52 hydrothermal vent 52 Sea otters 52 toothed whales 52 Gigantoraptor 52 damselfish 52 Late Cretaceous 52 quaggas 51 herbivorous 51 lowland forest 51 invertebrates 51 mosasaur 51 horned dinosaur 51 photosynthetic organisms 51 anthropoids 51 Indohyus 51 marine reptile 51 microfossils 51 undersea volcanoes 51 fossil 51 tyrannosaurs 51 megafauna 51 montane 51 Ardipithecus 51 tyrannosaur 51 parasitic wasp 51 amphipod 51 mammal 51 morphologically 51 melanosomes 51 sauropod 51 taxa 51 tetrapods 51 herbivory 51 termite mounds 51 Diplodocus 51 Neoproterozoic 50 tetrapod 50 Paleoanthropology 50 Jurassic Period 50 systematics 50 Palaeontologists 50 H. erectus 50 mammalian 50 insects spiders 50 vertebrates 50 Sperm whales 50 echidnas