Related by context. Frequent words. (Click for all words.) 65 horned dinosaur 64 horned dinosaurs 61 plesiosaurs 61 Gondwanaland 59 Late Cretaceous 58 grassy plains 58 coniferous forests 58 Late Triassic 57 temperate forests 57 supercontinent 56 Cretaceous Period 56 megafauna 56 Early Cretaceous 56 mosasaur 56 temperate rainforest 56 Burgess Shale 56 conifer forests 56 boreal forests 55 Jurassic Period 55 Columbian mammoth 55 Archaean 54 carnivorous dinosaurs 54 carnivorous dinosaur 54 Beringia 54 barrens 54 Carboniferous 54 H. erectus 54 Paleocene 54 deciduous forests 53 Mesozoic 53 Diplodocus 53 sedimentary basin 53 marine reptiles 53 baleen whale 53 feathered dinosaurs 53 biodiversity hotspot 53 continental crust 53 landmasses 53 evergreen forests 53 Gigantoraptor 53 terrestrial ecosystems 53 coprolites 52 hominid species 52 subarctic 52 marine reptile 52 wolves roam 52 cretaceous 52 dinosaurs 52 metamorphic rocks 52 Amazonian rainforest 52 Boreal forest 52 woolly mammoths 52 fossilized bones 52 stromatolites 52 Paleozoic 52 extinct volcanoes 52 Ordovician 52 arthropod 52 landmass 51 theropod 51 Cenozoic 51 hadrosaur 51 hydrothermal vent 51 Lake Vostok 51 greenstone belts 51 temperate zones 51 teosinte 51 Olmecs 51 Upper Cretaceous 51 lava tubes 51 radiocarbon dated 51 montane 51 tyrannosaur 51 volcanic islands 51 fossilized remains 51 Apatosaurus 51 boreal forest 51 Fertile Crescent 51 hominid fossils 51 Guiana Shield 50 ground sloths 50 sauropod 50 dinosaur fossil 50 dinosaurs roamed 50 Arctic foxes 50 tyrannosaurs 50 saber toothed tigers 50 Lower Cretaceous 50 Greater Yellowstone Ecosystem 50 caribou herds 50 Chronic wasting disease 50 ancestors migrated 50 Cyanobacteria 50 Namib Desert 50 Selkirk Mountains 50 Ice Ages 50 boreal 50 oceanic crust 50 undersea volcanoes 50 placental mammals 50 Sierra Madre mountains