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(Click for frequent words.) 69 glaciation 68 Permian extinction 67 Cryogenian 67 Paleocene Eocene Thermal Maximum 67 Younger Dryas 67 glaciations 64 Cambrian Explosion 64 Chicxulub impact 64 Palaeocene Eocene Thermal Maximum 64 Ice Ages 63 mass extinctions 63 mass extinction 63 interglacial period 63 Permian Triassic 62 Eemian 62 deglaciation 62 volcanism 62 Noachian 62 Great Oxidation Event 62 Cryogenian period 61 Milankovitch 61 Late Heavy Bombardment 61 Cambrian explosion 61 Ediacaran 61 Quaternary Period 61 KT boundary 61 Hadean 60 megafauna extinction 60 Holocene epoch 60 meteorite bombardment 60 Neoproterozoic 60 Permian Triassic extinction 60 meteor impacts 60 hydrological cycle 59 Lake Vostok 59 Last Glacial Maximum 59 paleoclimate 59 Hesperian epoch 59 clathrates 59 Anthropocene 59 subglacial 59 ALH# 59 interglacial 59 greenhouse warming 59 hydrosphere 59 megafauna 59 Little Ice Age 59 Cambrian Period 58 marine sediments 58 punctuated equilibrium 58 Antarctic Dry Valleys 58 Ediacaran Period 58 Miller Urey experiment 58 hydrothermal activity 58 Pleistocene 58 plate tectonics 58 Medieval Warm Period 57 geological epoch 57 supervolcano 57 atmospheric methane 57 dinosaur extinction 57 Late Ordovician 57 Mass Extinction 57 cryovolcanism 57 supervolcanoes 57 KT extinction 57 mantle convection 57 abiogenesis 57 Interglacial 57 Cretaceous extinction 56 Pliocene 56 magma ocean 56 Eocene epoch 56 meteorite impacts 56 glacial retreat 56 interglacial periods 56 tectonic plate movements 56 supercontinent 56 glacial melting 56 coccolithophores 56 biosignatures 56 Neogene 56 Neoproterozoic era 56 iridium layer 56 pre biotic 56 Quaternary 56 journal Geology 56 icy comets 56 Phanerozoic 56 Late Devonian 56 hydrologic cycle 56 Noachian era 55 sedimentary deposits 55 reionization 55 glacial cycles 55 sedimentary layers 55 kyr 55 Ontario Lacus 55 subglacial lakes 55 phyllosilicates 55 flood basalts 55 Late Triassic 55 climate modellers 55 Cenozoic era 55 warm interglacial 55 Precambrian 55 paleomagnetic 55 Dry Valleys 55 runaway greenhouse 55 Nature Geosciences 55 Svensmark 55 megadrought 55 Cyanobacteria 55 Hesperian Epoch 55 warmer wetter 54 subsurface ocean 54 Oligocene epoch 54 panspermia 54 glacial interglacial 54 Medieval Warming Period 54 Ordovician extinction 54 Cenozoic Era 54 Sturtian 54 asteroid impacts 54 stromatolites 54 Permian Period 54 magnetic substorms 54 Meridiani 54 solar nebula 54 alpine glaciers 54 geochemists 54 carbonate minerals 54 melting glacial 54 methane hydrates 54 Toba eruption 54 lavas 54 astrobiologists 54 atmospheric CO2 levels 54 Tertiary Period 54 Greenland Ice 54 Antarctic Ice 54 Cenozoic 54 Triassic Period 54 Neanderthal extinction 54 anoxic 54 Paleoclimate 53 Atlantic Multidecadal Oscillation AMO 53 Maastrichtian 53 basaltic rocks 53 glacial interglacial cycles 53 Hominids 53 Plate Tectonics 53 galactic alignment 53 glacial melt 53 multi decadal 53 Archaean 53 carbonaceous chondrite 53 warmings 53 primitive organisms 53 Holocene 53 Biogeography 53 methane hydrate 53 seafloor sediments 53 upwellings 53 mid Pliocene 53 magmas 53 sediments deposited 53 El Niño La Niña 53 El Niño Southern Oscillation 53 El Nino Southern Oscillation 53 mantle plumes 53 cosmic ray flux 53 Climatic Optimum 53 glaciers retreated 53 Puijila 53 Eocene Epoch 53 Mojzsis 53 polar vortex 53 polar caps 53 supernova explosion 53 supervolcano eruption 53 plankton blooms 53 Miocene epoch 53 atmospheric oceanic 53 Oetzi 53 Indian Ocean Dipole 53 lunar magma 53 supercomputer simulations 53 anthropogenic warming 53 Late Pleistocene 52 magnetic monopoles 52 ENSO 52 temperature reconstructions 52 Ordovician 52 Maunder Minimum 52 jarosite 52 diatoms 52 Jurassic Period 52 sterile neutrino 52 COROT 7b 52 Fermi Paradox 52 Pleistocene Ice Age 52 mammal extinctions 52 Siberian permafrost 52 Burgess Shale 52 Extrasolar 52 phytoplankton blooms 52 Hadean Eon 52 Oort cloud 52 Extinctions 52 southern supercontinent 52 Siberian Traps 52 Antarctic ozone 52 Paleogene 52 atmospheric circulation 52 continental drift 52 Medieval Warming 52 Antarctic icecap 52 substorm 52 galaxy formation 52 Bose Einstein condensation 52 Deccan volcanism 52 mammoths 52 glaciers melted 52 permanently shadowed craters 52 Saturn Enceladus 52 multicellular animals 52 Himalayan river basins 52 Lake Untersee 52 radiometric dating 52 Jupiter moons Europa 52 shadow biosphere 52 microbialites 52 Late Cretaceous 52 catastrophism 52 Pleistocene epoch 52 Jupiter moon Io 52 Mount Tambora 52 GJ #b [001] 52 paleoclimatic 52 superheavy elements 52 Martian meteorite 52 Sumatra Andaman earthquake 52 martian meteorites 52 Cretaceous Period 52 Chicxulub 52 prebiotic chemistry 52 abiotic 52 earliest hominid 52 magnetic reconnection 52 Pleistocene Epoch 52 Einstein relativity theory 52 atmospheric CO2 52 Volcanism 51 cratons 51 planetesimals 51 Permian Triassic boundary 51 cryosphere 51 Himalayan Glaciers 51 permafrost 51 Laurentide ice sheet 51 primitive meteorites 51 anthropic principle 51 atmospheric aerosols 51 ancient supercontinent 51 comets asteroids 51 Gondwanaland 51 Antarctic Ice Shelf 51 Hellas Basin 51 Martian 51 fossilization 51 meteoroid impacts 51 lunar crust 51 anthropogenic climate 51 reionization epoch 51 Pleistocene era 51 terrestrial ecosystems 51 Laurentide Ice Sheet 51 lunar perigee 51 Syrtis Major 51 Otto Bliesner 51 Zalasiewicz 51 glaciers receded 51 Pacific Decadal Oscillation 51 forcings 51 sunspot activity 51 coolings 51 PETM 51 Tibetan Plateau 51 Sarahsaurus 51 Zeebe 51 volcanic lava flows 51 substorms 51 Arctic oscillation 51 abiogenic 51 Paleozoic Era 51 Beringia 51 isotopic composition 51 Gliese #g 51 sub glacial lakes 51 biosignature 51 Milankovitch cycles 51 interglacials 51 faunas 51 mid latitudes 51 Nature Geoscience 51 El Niños 51 atmospheric carbon dioxide 51 Eocene Oligocene 51 upwelling 51 atmospheric CO2 concentration 51 Greenland ice 51 tectonic activity 51 warm interglacial periods 51 Corot 7b 51 paleoclimatologists 51 ocean upwelling 51 biospheric 51 chondritic meteorites 51 McMurdo Dry Valleys 51 methanogens 51 megaflood 51 climate modelers 51 Late Paleozoic 51 Cretaceous 51 planetary warming 51 volcanic eruptions 51 Cretaceous Tertiary boundary 51 Dansgaard 51 Yellowstone supervolcano 51 Magellanic Stream 51 Jakobshavn Isbrae 51 atmospheric CO 51 moulins 51 ornithischians 51 macroevolution 50 Cretaceous Tertiary KT 50 Nili Fossae 50 nucleosynthesis 50 Appy Sluijs 50 Mass Extinctions 50 carbonate globules 50 Martians invading 50 planemos 50 Cretaceous Tertiary extinction 50 tropical glaciers 50 microfossils 50 moon Europa 50 supermoons 50 seabed sediments 50 Gigantopithecus 50 paleoecology 50 Arctic Oscillation 50 Amundsen Sea Embayment 50 noctilucent clouds 50 axial tilt 50 polar regions 50 Devonian Period 50 forams 50 cataclysmic eruption 50 phreatic 50 hydrated minerals 50 comet nuclei 50 Cosmological 50 equatorial bulge 50 icecaps 50 Reiner Gamma 50 quark gluon 50 lithosphere 50 lunar meteorites 50 isotope fractionation 50 Henrik Svensmark 50 Alpine glaciers 50 magnetic polarity 50 mineral olivine 50 paleoclimatology 50 journal Meteoritics 50 Santorini eruption 50 Pleistocene Age 50 Polar Regions 50 Friis Christensen 50 sulfur isotope 50 Plate tectonics 50 Triassic Jurassic 50 Homo sapiens evolved 50 nitrogen fixation 50 glaciers 50 tropopause 50 Lake Cheko 50 CO2 concentrations 50 Earth biosphere 50 Cretaceous Tertiary 50 Mercury magnetosphere 50 Arabia Terra 50 volcano Olympus Mons 50 Pacific Decadal Oscillation PDO 50 Upper Paleolithic 50 marine phytoplankton 50 continental crust 50 Alfred Wegener 50 Panspermia 50 mesosphere 50 tardigrades 50 Southern Oscillation 50 Asteroid Apophis 50 Keeling Curve 50 Tiktaalik 50 AGW theory 50 prebiotic molecules 50 golden toad 50 Gakkel Ridge 50 Late Jurassic 50 quark gluon plasma 50 oxygen isotopes 50 Carboniferous 50 Geoengineering 50 Cosmic Microwave Background 50 Tunguska meteorite 50 Mesozoic 50 glaciological 50 Rignot 50 ferric oxides 50 martian 50 multicellular organisms 50 Martian gullies 50 Orcus Patera 50 methane clathrates 50 ostracods 50 dustier stormier atmosphere 50 Schladow 50 Solar Terrestrial Physics 50 photosphere 50 journal Astrobiology 50 explosive volcanism 49 albedo feedback 49 Tharsis Rise 49 Gamma ray burst 49 megadroughts 49 Medieval Warm Period MWP 49 Cretaceous Paleogene 49 cave stalagmites 49 single celled algae 49 refugia 49 midlatitudes 49 isotopic compositions 49 lunar craters 49 Martian volcanoes 49 Anthony Barnosky 49 Sedimentary rocks 49 biogeochemical cycles 49 conodonts 49 NDEs 49 undersea volcanoes 49 Melting Glaciers 49 iceberg calving 49 spiral nebulae 49 chondrites 49 Gliese #c 49 Madden Julian Oscillation 49 el Nino 49 permafrost degradation 49 Antarctic ice 49 evolutionary divergence 49 Evolutionary biology 49 lowermost mantle 49 anthropogenic greenhouse gas 49 Eocene 49 Bedout 49 chondrules 49 Antarctic glaciers 49 plesiosaurs 49 surface temperatures SSTs 49 lava tubes 49 mud volcanoes 49 HIP #b 49 GtC 49 astrobiological 49 deep convective clouds 49 landforms 49 El Nio 49 lake sediments 49 Sr Ca 49 isotope ratios 49 Climategate scandal 49 tiny single celled 49 Tunguska Event 49 Joan Kleypas 49 hominid evolution 49 receding glaciers 49 Atlantic Multidecadal Oscillation 49 chondritic 49 Arctic permafrost 49 geosphere 49 thermal inertia 49 Early Cretaceous 49 radiocarbon 49 TrES 4 49 Younger Dryas cold 49 Astrobiology 49 crinoids 49 tholins 49 Deccan Traps 49 Ötzi 49 methane seeps 49 anthropogenic emissions 49 carbon dioxide concentrations 49 Lake Yoa 49 woolly mammoths 49 SN #A 49 primate evolution 49 Carboniferous Period 49 Martian meteorites 49 fossilisation 49 palaeo 49 ° C warmer 49 Velicogna 49 Gusev crater 49 WASP #b 49 bonebed 49 multicellularity 49 Fomalhaut b 49 calderas 49 Solar Flares 49 paleoenvironmental 49 sulfate aerosols 49 Kilimanjaro glaciers 49 cometary dust 49 carbonyl sulfide 49 evaporite 49 homochirality 49 Martian surface 49 Chicxulub asteroid 49 coronal heating 49 galactic cannibalism 49 erosional 49 icecap 49 climategate controversy 49 moon Enceladus 49 boreal regions 49 Substorms 49 H. habilis 49 megafaunal 49 Martian microbes exist 49 sea hydrothermal vents 48 supersolid 48 multicellular creatures 48 A. ramidus 48 carbonaceous chondrites 48 Nectocaris 48 Tycho supernova 48 SN#A 48 Sinus Meridiani 48 SN #gy 48 molten magma 48 geologic 48 icesheets 48 moon gravitational pull 48 matter antimatter asymmetry 48 Fermi paradox 48 El Ninos 48 fluid inclusions 48 geology paleontology 48 Type 1a supernova 48 Transantarctic Mountains 48 glaciers melt 48 Stratospheric ozone 48 biogeochemical 48 dromaeosaurs 48 glacier melts 48 Saturn moon 48 ARkStorm 48 oceanic crust 48 radioactive decay 48 explosive eruptions 48 retreating glaciers 48 eruptive activity 48 igneous rocks 48 gyres 48 trophic cascade 48 Middle Awash 48 extrasolar 48 dinosaurs 48 methane burps 48 polar latitudes 48 Maunder minimum 48 Coral bleaching 48 Copenhagen Diagnosis 48 journal Icarus 48 Weddell Sea 48 Woese 48 Chasma Boreale 48 shadowed craters 48 dynamical processes 48 isotope composition 48 WMAP satellite 48 hydrothermal vents 48 dinosaurs roamed 48 metazoans 48 Ozone Hole 48 Paleocene Eocene 48 oceanic circulation 48 polar 48 volcanic basalt 48 dirty snowballs 48 climatic variability 48 volcanic magma 48 photosynthetic organisms 48 GLOF 48 Upper Palaeolithic 48 Cretaceous periods 48 biogeochemical processes 48 exosphere 48 foraminifera 48 geochronology 48 cosmogenic 48 Jupiter icy moons 48 Eric Rignot 48 interstellar cloud 48 oxygen isotope 48 Greenland Antarctica 48 icy moons 48 mosasaurs 48 prokaryotes 48 spherules 48 meridional overturning circulation 48 inhaled fibers 48 Palaeozoic sedimentary 48 presolar grains 48 Yellowstone caldera 48 Deccan eruptions 48 warmer wetter winters 48 Natalie Mahowald 48 teleconnections 48 nanobacteria 48 Valles Marineris 48 biomineralization 48 decoherence 48 asteroidal 48 gaseous planet 48 fearsome Tyrannosaurus rex 48 supernova explosions 48 solar irradiance 48 ramidus 48 Bose Einstein condensates 48 anomalously warm 48 Dr van Ommen 48 Greenland icesheet 48 magmatic 48 metastable 48 weakly interacting 48 astronomer Percival Lowell 48 icesheet 48 missing baryons 48 Phaethon 48 silicate rocks 48 Mesolithic 48 cometary impacts 48 journal Palaios 48 Earthlike planet 48 Neukum 48 Surtsey 48 Medieval Warm 48 Mayan calendar ends 48 Tunguska 48 proton decay 48 geologically active 48 Sturtian glaciation 48 Tawa hallae 48 desiccation 48 Aiguo Dai 48 geological timescale 48 bioaccumulation 48 equatorial latitudes 48 species extinctions 48 arctic plains 48 Jean Baptiste Lamarck 48 Alfven waves 48 Roman Warm Period 48 microbial organisms 48 archeopteryx 48 Ardipithecus ramidus 48 epigenetic changes 48 Martian rocks 48 sulphate aerosols 48 Ice Age 48 methane clathrate 48 glacial ice 48 multicellular 48 biogenic 48 Ardipithecus 48 Fram Strait 48 protoplanetary disk 48 SuperMoon 48 Heterodontosaurus 48 sulfidic 48 anthropoid primates 48 global weirding 48 trophic cascades 48 sympatric speciation 48 Ice Age mammals 48 sauropodomorphs 48 planetesimal 48 Pliocene epoch 48 chlorine monoxide 48 C4 grasses 47 Sheet WAIS 47 Mayan prophecies 47 planetary geologists 47 ejecta blanket 47 observable phenomena 47 Kounaves 47 GJ#b 47 seiche 47 austral summer 47 Supervolcano 47 ENSO cycle 47 deca BDEs 47 CoRoT 7b 47 loess 47 stratospheric ozone depletion 47 Gerard Kuiper 47 Palaeozoic era 47 Olduvai 47 Jakosky 47 thermosphere 47 Henize #-# 47 geothermal gradient 47 mountain glaciers 47 melt inclusions 47 Mayan Calendar 47 exoplanetary 47 Atmospheric Chemistry 47 QQ# 47 marine reptiles 47 coronal loops 47 Late Cretaceous Period 47 Anthropogenic 47 sedimentary rock 47 prebiotic soup 47 cyanobacterial blooms 47 protoplanet 47 Cretaceous Paleogene boundary 47 melting glacier 47 primordial soup 47 embodied cognition 47 Permafrost 47 hydroxyl molecules 47 Mercury flyby 47 ejecta 47 Greenland icecap 47 planets atmospheres 47 glacier shrinkage 47 Hygiene Hypothesis 47 planetary alignments 47 nicknamed Ardi 47 outlet glaciers 47 Neo Darwinism 47 post perovskite 47 polar ice 47 Cassini flybys 47 celestial phenomena 47 oxygenic photosynthesis 47 astronomical alignments 47 Abrupt Climate Change 47 ice nucleation 47 Terraforming 47 olivine 47 anthropogenic 47 speleothems 47 planet Gliese #g 47 singularities 47 Chicxulub crater 47 glacier retreat 47 Enceladus 47 goethite 47 scientists theorize 47 IPY 47 YORP effect 47 Willerslev 47 Chazy Reef 47 heliosheath 47 prehistory 47 sulfate aerosol 47 Norris Geyser Basin 47 cosmic ray intensity 47 Di Achille 47 vertebrate evolution 47 Warmer oceans 47 large oceanic plateaus 47 Martian microbes 47 volcanic activity 47 terrestrial vertebrates 47 galactic cosmic rays 47 glacial 47 depositional 47 phlogiston 47 Cassini flyby 47 Tiktaalik roseae 47 interstellar clouds 47 Ryskin 47 Ocean Acidification 47 V# Mon 47 basalts 47 cometary material 47 phyllosilicate 47 Wolf Rayet star 47 Asteroid Belt 47 albedo 47 olivines 47 marine plankton 47 subglacial lake 47 sedimentological 47 journal Geophysical Research 47 Simone Tilmes 47 photochemical reactions 47 coevolution 47 supercontinents 47 H. floresiensis 47 pliosaur ferocious predator 47 Subarctic 47 Liang Bua 47 planetary nebula 47 Quadrantids 47 RS Ophiuchi 47 Permo Triassic 47 paleo 47 active volcanism 47 La Nià ± 47 comets 47 sunspot cycle 47 dwelling organisms 47 Sauropods 47 microbial ecosystems 47 acidification 47 astrophysical 47 polar craters 47 amyloid cascade 47 gravitational microlensing 47 subatomic scale 47 exo planet 47 moonquakes 47 supersymmetric particles 47 noble gases 47 subpolar 47 magmatism 47 neutrino physics 47 Antarctica 47 wrinkle ridges 47 organic molecules 47 melting permafrost 47 palaeoclimate 47 cosmologists 47 isotopic ratios 47 Habitable Planet 47 multi celled organisms 47 oxygen depletion 47 Yellowstone Caldera 47 sediments 47 Sesia Valley 47 Harmonic Convergence 47 micro meteorites 47 El Nino warming 47 Cosmic Microwave Background CMB 47 marine ecologists 47 hominid species 47 Larsen Ice Shelf 47 carbon cenospheres 47 isostatic rebound 47 protoplanets 47 Planetary Change 47 sulfur isotopes 47 trilobites 47 prehuman 47 Higgs singlet 47 ocean sediment cores 47 lithospheric 47 Cabeus 47 neutrino oscillation 46 Bug Nebula 46 evolutionary theorists 46 dangerously overheat 46 Nikku Madhusudhan 46 Woolly mammoths 46 Asteroid Impact 46 Shakhova 46 carbon isotopes 46 atmospheric concentrations 46 Brigham Grette 46 Albedo 46 Konrad Steffen 46 Neanderthals Homo neanderthalensis 46 prehistoric 46 NSIDC 46 Earhart disappearance 46 climate alarmists 46 Hominid 46 cyanobacteria 46 anthropogenic carbon dioxide 46 layered outcrops 46 Cold Dark Matter 46 El Niño 46 ocean acidity 46 sunspot cycles 46 deformational 46 superconductivity arises 46 formamide 46 Evolutionary theory 46 sediment cores 46 interstellar dust grains 46 Big Bang cosmology 46 Gamburtsev 46 glaciers melting 46 Seafloor 46 Dr Glikson 46 stony meteorites 46 fossils 46 infantile amnesia 46 oceanic currents 46 glacier melting 46 Ventastega 46 zircons 46 Palaeo 46 tetrapods evolved 46 Prochlorococcus 46 cinder cones 46 Noachian period 46 gray hematite 46 Eutrophication 46 Siple Dome 46 greatest insect emergences 46 Cambrian Ordovician 46 sulfate minerals 46 Gondwana supercontinent 46 hypernova 46 Current Warm Period 46 radiative forcing 46 Mars Squyres 46 astronomical phenomena 46 fissure eruption 46 Rossby waves 46 photochemical processes 46 Jonathan Lunine 46 Ocean acidification 46 glacial geology 46 Sumatran earthquake 46 Fossae 46 eruptive phase 46 gas hydrates 46 anamensis 46 equatorial Pacific Ocean 46 planets comets 46 phytoplankton bloom 46 radiocarbon dating 46 dynamical evolution 46 Lunine 46 orbital eccentricity 46 geomorphic 46 dinosaur Sereno 46 Astrophysical 46 rocky planets 46 geology hydrology 46 NASA Wilkinson Microwave 46 Krakatoa erupted 46 geodynamics 46 Soufriere Hills Volcano 46 biogeochemical cycling 46 Molecular Ecology 46 glacier calving 46 GRB #B 46 manmade greenhouse gases 46 avian dinosaurs 46 Biogeochemistry 46 Melting Arctic 46 Late Miocene 46 geomagnetic substorms 46 Palaeolithic 46 geomorphology 46 ocean fertilization 46 seafloors 46 Arctic icecap 46 amplifying feedbacks 46 biosphere 46 extinctions 46 Laramidia 46 climatic 46 volcanic vents 46 Surface Temperature 46 SuperCroc 46 rifting 46 Type Ia supernova 46 cosmic microwave background 46 Archean Expansion 46 neutrino oscillations 46 atmospheric CO2 concentrations 46 comets orbiting 46 super Earths 46 crossbedding 46 hydrothermal 46 CMB radiation