Related by context. Frequent words. (Click for all words.) 63 theropod 61 crocodilian 60 feathered dinosaurs 59 tyrannosaur 59 horned dinosaur 58 carnivorous dinosaur 58 Ardipithecus ramidus 58 pterosaur 58 Diplodocus 57 plesiosaur 56 trilobites 56 pliosaur 56 Fossilized 56 theropods 55 ammonites 55 sauropod 54 fossilized remains 54 Indohyus 54 tyrannosaurs 54 giant tortoise 54 Late Cretaceous 54 hadrosaur 54 mottled brown 54 dinosaur footprints 53 Raptorex 53 sauropods 53 Archaeopteryx 53 tetrapod 53 H. erectus 53 Ardipithecus 53 Otzi 53 carnivorous dinosaurs 53 Tiktaalik 53 hydrothermal vent 52 fossils 52 anthropoids 52 palaeontologists 52 fossil 52 Burgess Shale 52 fossilized bones 52 Jurassic Period 52 Australopithecus afarensis 52 Columbian mammoth 52 palaeontologist 52 Australopithecus 52 hominid 52 erectus 52 saber toothed cat 52 radiocarbon dated 52 mammal 51 beaked whale 51 tyrannosaurus rex 51 coelacanth 51 Apatosaurus 51 limestone cave 51 pterosaurs 51 prehistoric 51 Mesozoic 51 stromatolites 51 placental mammals 51 Namib Desert 50 Palaeontologists 50 hominids 50 mantis shrimp 50 afarensis 50 snail shells 50 Palaeolithic 50 skink 50 supercontinent 50 Stegosaurus 50 Nigersaurus 50 snouted 50 apelike 50 vertebrate 50 Cretaceous Period 50 primate evolution 50 hominins 50 tetrapods 50 billed dinosaur 50 Homo habilis 50 Neandertal 50 marine reptiles 50 dinosaur fossil 50 forelimbs 50 arthropod 49 marine reptile 49 ground sloths 49 mammal species 49 toothed whales 49 palaeontology 49 bird beak 49 T rex 49 Allosaurus 49 hominin 49 convergent evolution 49 lava tubes 49 saber toothed tigers 49 crocodilians 49 serrated teeth 49 unicellular 49 flycatchers