Related by context. Frequent words. (Click for all words.) 57 placental mammals 53 collagen fibers 53 calcareous 52 Diplodocus 52 mouthparts 52 theropod 51 Indohyus 51 fibrous 51 morphologically 51 hadrosaur 51 feathered dinosaurs 50 melanosomes 50 H. erectus 50 trilobites 50 Ardipithecus 49 foraminifera 49 scaly skin 49 canine teeth 49 marine invertebrates 49 tooth enamel 49 mottling 49 nacre 49 herbivores 49 isotope ratios 49 chewy texture 49 hominins 48 carnivorous dinosaurs 48 vertebrate animals 48 Late Cretaceous 48 herbivorous 48 unicellular 48 microfossils 48 leathery skin 48 fossilization 48 acidic soils 48 moa 48 gut microbes 47 sauropods 47 tyrannosaurs 47 crocodilians 47 baleen whales 47 Neandertals 47 Ardipithecus ramidus 47 Jurassic Period 47 greenish brown 47 tyrannosaur 47 Cretaceous Period 47 heartwood 47 zircons 47 marine reptiles 47 angiosperms 47 oxygen isotopes 47 marine reptile 46 coprolites 46 forelimbs 46 continental crust 46 brittle 46 anthropoids 46 Mesozoic 46 multicellular organisms 46 hominin 46 wooly mammoth 46 wrinkled skin 46 arthropod 46 toothed whales 46 theropods 46 African savanna 46 tetrapod 46 mammoths 46 bones 45 Fossilized 45 molars 45 single celled organisms 45 megafauna 45 morphological 45 prokaryotes 45 cortical bone 45 dentition 45 platypuses 45 Columbian mammoth 45 abraded 45 bipedalism 45 ammonites 45 chewier 45 neural tissue 45 fatty tissue 45 termite mounds 45 diatoms 45 striated 45 Stegosaurus 45 hominids 45 brownish gray 44 fossa 44 faunal 44 otoliths 44 temperate forests 44 matted fur 44 Homo habilis 44 mottled 44 Radiocarbon dating 44 herbivore