Related by context. Frequent words. (Click for all words.) 62 angiosperms 57 placental mammals 56 Jurassic Period 56 supercontinent 56 temperate forests 56 faunal 55 feathered dinosaurs 54 morphologically 54 landmasses 54 marine sediments 53 megafauna 53 Beringia 53 Late Cretaceous 53 biogeography 53 H. erectus 53 Lapita 53 marine invertebrates 53 terrestrial ecosystems 52 taxa 52 Amazonian rainforest 52 morphologies 52 hydrothermal vent 52 theropod 52 platypuses 52 latitudinal 52 tetrapods 51 underwater volcanoes 51 trilobites 51 radiocarbon dated 51 Gondwana 51 multicellular 51 Palaeolithic 51 species 50 Cretaceous Period 50 tetrapod 50 Early Cretaceous 50 clades 50 Mesozoic 50 planktonic 50 hominins 50 landforms 50 theropods 50 deglaciation 50 Cambrian explosion 49 systematics 49 snail shells 49 marine reptiles 49 vertebrate species 49 Archaean 49 biogeochemical 49 toothed whales 49 temperate zones 49 lithosphere 49 undersea volcanoes 49 igneous rocks 49 Carboniferous 49 tropics 49 basaltic 49 mud volcanoes 49 middens 49 mammals 48 phylogenetic tree 48 volcanic islands 48 Neandertal 48 continental crust 48 skink 48 lake sediments 48 hominin 48 termite mounds 48 vertebrate animals 48 Tibetan Plateau 48 lineages 48 theropod dinosaurs 48 tyrannosaur 48 ammonites 48 poleward 48 tunicates 48 Volcanic eruptions 48 Archaeopteryx 48 deciduous forests 48 geomorphology 47 subarctic 47 continental drift 47 evergreen forests 47 relict 47 phylogeny 47 moa 47 Younger Dryas 47 cycad 47 prehistory 47 phyla 47 seamount 47 biota 47 glaciation 47 equatorial regions 47 Burgess Shale 47 Poinar 47 migratory paths 47 Tiktaalik 47 Australopithecus 47 Indohyus