Related by context. Frequent words. (Click for all words.) 58 interglacial 58 Holocene 55 Little Ice Age 54 Medieval Warm Period 54 Quaternary 52 Pliocene 52 glaciation 50 Climatic 49 equinoxes 48 Pleistocene 47 Glacial 47 mass extinctions 47 ENSO 46 Eocene 46 Carboniferous 46 Late Cretaceous 45 El Ninos 45 epochs 44 hydrological cycle 44 Ice Age 44 CO2 concentrations 44 greenhouse warming 44 sunspot activity 44 Permafrost 43 Humid 43 Sunspots 43 Warmest 43 decadal 43 Triassic 43 glacial melt 43 Homo sapiens 43 Variability 43 sunspot cycle 43 Cretaceous 43 Evaporation 43 PETM 42 terrestrial ecosystems 42 Warming 42 volcanism 42 Hypothesis 42 megafauna 42 hotter summers 42 atmospheric CO2 42 Precambrian 42 temperate regions 41 Winter Solstice 41 atmospheric carbon dioxide 41 mid latitudes 41 atmospheric concentrations 41 Cretaceous Period 41 Cold Snap 41 solstice 41 substorms 41 Melting 41 lithosphere 41 greenhouse gas concentrations 41 temperate zones 41 mass extinction 41 Northern Hemisphere 40 paleo 40 continental drift 40 plate tectonics 40 Periods 40 Summer Solstice 40 El Nino 40 climatic 40 hunter gatherers 40 Mesozoic 40 atmospheric circulation 40 Temperature 40 Neandertals 40 Droughts 40 Greenland Ice 40 El Niño 40 Neanderthals 39 desiccation 39 anoxic 39 climatological 39 aridity 39 cyclic 39 tropics 39 spring equinox 39 Industrial Revolution 39 Changing Climate 39 Fertile Crescent 39 anatomically modern 39 equinox 39 millennia 39 upwelling 38 Paleo 38 glacial 38 Paleolithic 38 Neolithic 38 storminess 38 Patterns 38 Geoengineering 38 mountain glaciers 38 autumnal equinox 38 sunspots 38 speciation 38 Fossils