Related by context. Frequent words. (Click for all words.) 46 glaciation 46 Mesozoic 44 Pleistocene 43 plate tectonics 43 Antarctica 42 volcanism 42 Homo sapiens 42 Earth crust 42 equatorial 42 Antarctic Peninsula 42 dinosaurs 41 Precambrian 41 Eocene 41 Neanderthals 41 Cretaceous 41 Australopithecus 41 Ice Age 41 fossils 40 Archaeopteryx 40 palaeontologists 40 tetrapods 40 sedimentary rock 40 Homo erectus 40 Fossils 40 sauropods 40 hominids 40 Triassic 39 Jurassic 39 Holocene 39 Proterozoic 39 fossil 39 pterosaur 39 hominid 39 paleo 39 Antarctic Ice 38 caldera 38 Antarctic 38 sauropod 38 Greenland 38 Great Rift Valley 38 mammoths 38 Ordovician 38 landmass 38 lineages 37 vertebrate 37 common ancestor 37 woolly mammoth 37 Devonian 37 paleontologists 36 taxa 36 Little Ice Age 36 marsupials 36 Antarctic ice 36 pterosaurs 36 glaciers 35 Archean 35 Triceratops 35 Anasazi 35 tropics 35 T. rex 35 hunter gatherers 35 vertebrates 35 Ellesmere Island 35 Pliocene 35 Polynesians 34 PETM 34 sedimentary rocks 34 dinosaur 34 colonized 34 equator 34 tusk 34 prehistory 34 homo sapiens 34 Incas 34 biosphere 34 extinct 34 geologically 34 Mineralized 34 oceanic 34 mammal 34 hydrothermal 34 mammals 34 sedimentary 33 prehistoric 33 glacier 33 geologic 33 extinct species 33 herbivores 33 hunter gatherer 33 mid latitudes 33 stratigraphy 33 polar 33 atmospheric circulation 33 #BC [003] 33 woolly mammoths 33 icebergs 33 paleontological 33 Homo 33 Greenland ice 33 mass extinction 33 volcanic rocks