Related by context. Frequent words. (Click for all words.) 70 Gondwana 63 landmasses 62 Late Cretaceous 60 Cretaceous Period 60 megafauna 59 volcanic islands 58 lithosphere 57 continental drift 56 glaciation 55 anatomically modern 55 plate tectonics 54 Weddell Sea 54 Carboniferous 54 Mesozoic 54 interglacial 53 Earth crust 53 Wilkins Ice Shelf 53 Archaea 53 tyrannosaurs 53 hominins 53 tetrapods 52 Antarctica 52 landmass 52 Homo sapiens 52 Pleistocene 52 Australopithecus 52 trilobites 52 Ordovician 52 volcanism 51 Precambrian 51 tyrannosaur 51 carnivorous dinosaurs 51 dinosaurs 51 woolly mammoths 51 Quaternary 51 equator 51 Cretaceous 51 Neandertals 51 Neanderthals 50 multicellular 50 temperate zones 50 genus Homo 50 equatorial 50 sedimentary rock 50 sauropod 50 Eocene 50 lineages 49 theropods 49 subduction 49 earth crust 49 Homo habilis 49 archaea 49 temperate regions 49 dwarf galaxy 49 hominids 49 Fertile Crescent 49 terrestrial ecosystems 49 supernova explosion 49 epochs 49 marine sediments 49 Great Rift Valley 49 Kalahari Desert 49 Tiktaalik 49 Ardipithecus 49 Little Ice Age 49 mammoths 48 fossils 48 Homo erectus 48 seamount 48 sauropods 48 Paleozoic 48 Antartica 48 single celled organisms 48 clades 48 single celled 48 tropics 48 equatorial regions 48 basalts 48 glaciers 48 palaeontology 48 multicellular organisms 48 Antarctic peninsula 48 Denisovans 48 hominid 47 crustal 47 Kuiper belt 47 Iapetus 47 common ancestor 47 palaeontologists 47 Ellesmere Island 47 Medieval Warm Period 47 Paabo 47 Proterozoic 47 Triassic 47 tectonic plate 47 geologically active 47 Pliocene 47 magnetar 47 volcanic crater 47 Fossils 46 supernova explosions