Related by context. Frequent words. (Click for all words.) 67 pterosaur 63 Archaeopteryx 62 feathered dinosaurs 60 theropod 59 theropods 58 tyrannosaur 58 carnivorous dinosaur 57 Gigantoraptor 57 Raptorex 57 pterosaurs 56 Ardipithecus ramidus 56 Nigersaurus 55 hadrosaur 55 Indohyus 55 pliosaur 55 Diplodocus 55 Fossilized 54 tyrannosaurus 54 tetrapod 54 tailless 54 T. rex 54 horned dinosaur 54 pectoral fins 53 H. erectus 53 Velociraptor 53 forelimbs 52 Palaeontologists 52 Brachiosaurus 52 marine reptile 52 mammal 52 erectus 52 Tiktaalik 52 sauropod 52 velociraptor 52 Tyrannosaurus 52 crocodilians 52 carnivorous dinosaurs 51 Ivory billed Woodpecker 51 mitochondrial genome 51 afarensis 51 Apatosaurus 51 toothed whales 51 LB1 51 fossilized remains 51 Allosaurus 51 Neandertal 51 Tyrannosaurus rex 51 T rex 51 Jurassic Period 50 Columbian mammoth 50 plesiosaur 50 tyrannosaurus rex 50 billed dinosaur 50 Opportunity rover 50 apelike 50 wooly mammoth 50 pterodactyl 50 placental mammals 49 sexual dimorphism 49 moonlets 49 dinosaur 49 flightless birds 49 triceratops 49 Homo floresiensis 49 Otzi 49 palaeontologists 49 sauropods 48 giant tortoise 48 tetrapods 48 hominin 48 fossilized bones 48 crocodilian 48 Titan Saturn 48 vertebrate species 48 flagellum 48 convergent evolution 48 fossil 48 clouded leopard 48 hominins 48 flightless bird 48 beaked whale 48 Australopithecus 48 coprolites 48 simian immunodeficiency virus 48 arthropod 47 Ardipithecus 47 moa 47 dinosaur skeleton 47 serrated teeth 47 forelimb 47 fossil specimens 47 dinos 47 mandible 47 pterodactyls 47 hominid 47 hind limbs 47 brontosaurus 47 Longrich 47 narwhal 47 meter wingspan 47 mottled brown