Related by context. Frequent words. (Click for all words.) 65 theropod 63 tyrannosaur 62 feathered dinosaurs 61 Diplodocus 60 tetrapod 58 Archaeopteryx 57 hadrosaur 57 mottled brown 57 crocodilians 57 horned dinosaur 57 pterosaur 56 sauropod 56 Tiktaalik 55 marine reptile 55 Stegosaurus 55 subfamily 55 billed dinosaur 55 placental mammals 54 Indohyus 54 Allosaurus 54 Brachiosaurus 53 triceratops 53 plesiosaur 53 Columbian mammoth 53 pliosaur 53 forelimbs 53 H. erectus 53 tyrannosaurus rex 53 T rex 53 Triceratops 53 specimen 52 toothed whales 52 arthropod 52 specimens 52 giant tortoise 52 theropods 52 carnivorous dinosaurs 52 Velociraptor 52 vertebrate 51 Tyrannosaurus rex 51 mammal 51 tetrapods 51 cycad 51 stickleback 51 tyrannosaurs 51 Cretaceous Period 51 Ardipithecus 51 mammals 51 ground sloths 50 fossils 50 grebe 50 hominid 50 skink 50 T. rex 50 stegosaurus 50 vertebrates 50 greenish brown 50 LB1 50 taxon 50 canine teeth 50 pipefish 50 cygnet 50 platypuses 50 morphologically 49 trilobites 49 species 49 saola 49 flycatcher 49 ammonites 49 Tyrannosaurus 49 Vertebrate Paleontology 49 sea anemones 49 mantis shrimp 49 genus 49 wooly mammoth 49 hominin 49 marten 49 sauropods 49 pectoral fins 49 Homo habilis 49 herbivorous 48 Ardipithecus ramidus 48 saber toothed cat 48 fossilized bones 48 vertebrate animals 48 rhesus macaque 48 coelacanth 48 clade 48 Burgess Shale 48 Bornean 48 flycatchers 48 Sumatran rhinos 48 sexual dimorphism 48 Australopithecus 48 Longrich 48 dragonfly 48 evolutionarily 48 angiosperms 48 phyla 48 rufous 48 vertebrate species