Related by context. Frequent words. (Click for all words.) 46 dinosaurs 43 dinosaur 42 evolutionary 40 dino 39 glacial 38 plate tectonics 38 T rex 38 fossil 37 fossilized 37 dinos 37 gradual 37 tortoise 36 T. Rex 36 quickens 36 Tyrannosaurus Rex 36 mammoths 35 T. rex 35 sauropods 35 rapid 35 evolution 34 pterodactyl 34 extinctions 34 prehistoric 34 pterosaurs 34 slower 34 vertebrate 34 Dinosaurs 34 cyclic 33 primeval 33 Homo sapiens 33 faster 33 slow 33 bipedal 33 Ice Age 32 homo sapiens 32 epochs 32 inexorable 32 woolly mammoth 32 woolly mammoths 32 caterpillar 31 diatoms 31 quicker 31 accelerating 31 vertebrates 31 climatological 31 Slow 31 herbivore 31 quickening pace 31 lumbering 31 penguin 31 locomotion 31 fossils 31 primate species 31 imperceptibly 31 Neanderthals 31 mass extinctions 31 mammals 31 tectonic 31 herbivores 30 speciation 30 eukaryotes 30 Jurassic 30 slowly 30 extinct 30 atmospheric CO2 30 Pleistocene 30 sauropod 30 hominids 30 evolves 30 glaciation 30 Triceratops 30 Paleolithic 30 discontinuous 30 taxa 30 inevitable 30 Cretaceous 30 prehistory 30 eons 30 quickening 30 adapt 29 Triassic 29 mass extinction 29 Mammals 29 lizards 29 synchronous 29 humans 29 linear 29 pace 29 morphological 29 warp speed 29 rapidity 29 quickened 29 millennia 29 galloping 29 gazelle 29 reptilian 29 mammalian 29 Prehistoric 29 paleo 29 Fossils 29 ape