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(Click for frequent words.) 69 Gondwanaland 66 supercontinent 65 landmasses 65 supercontinent Pangea 65 supercontinent Pangaea 64 ancient supercontinent 64 supercontinent Gondwana 63 tectonic rift 63 supercontinents 62 rifting 61 Laurasia 60 southern supercontinent 60 crustal plates 59 Laurentide ice sheet 59 lithosphere 58 Ayles Ice Shelf 58 Larsen Ice Shelf 58 protoplanets 57 flood basalts 57 ocean basins 57 sedimentary layers 57 Mertz Glacier 57 Ross Ice Shelf 57 glaciers melted 56 Permian Period 56 continental drift 56 Petermann Glacier 56 Tectonic plates 56 lunar crust 56 glaciations 56 Chicxulub crater 55 faunas 55 tectonic plate movements 55 glaciers retreated 55 evolutionary lineage 55 Cryogenian 55 Antarctic glacier 55 anticyclones 55 Antarctic glaciers 55 Gondwanan 55 meteor impacts 55 calderas 55 galactic disk 55 Earth tectonic plates 55 Eocene epoch 54 deep convective clouds 54 ape ancestors 54 sub glacial lakes 54 Siberian Traps 54 glaciers receded 54 gyres 54 Chicxulub impact 54 supercolony 54 Antarctic continent 54 planetesimals 54 Tharsis Rise 54 tectonic movements 54 KT boundary 54 magma ocean 54 Deccan Traps 54 continental rifting 54 dromaeosaurs 54 cratons 54 volcanic plumes 53 ornithischians 53 Wilkins Ice Shelf 53 polar vortex 53 Laurentide Ice Sheet 53 ocean ridges 53 Gondwana 53 Polar Vortex 53 ancient hominid 53 Neogene 53 Paleocene Eocene Thermal Maximum 53 Cretaceous Paleogene 53 GJ#b 53 Warmer oceans 53 undersea volcanoes 53 supervolcanoes 53 mantle plumes 53 Chicxulub Crater 53 poleward 53 subglacial lakes 53 biogeographic 53 lithospheric 53 glaciation 52 crustal plate 52 oceanic circulation 52 plate tectonics 52 Pleistocene Epoch 52 Triassic Period 52 Cenozoic era 52 glacial cycles 52 magnetic monopoles 52 collisional 52 Neoproterozoic 52 icecaps 52 herbivorous dinosaurs 52 Fram Strait 52 Ordovician extinction 52 Cumbre Vieja 52 continental crust 52 Tertiary Period 52 chondrules 52 galactic clusters 52 homo erectus 52 Plate tectonics 52 primitive organisms 51 grabens 51 seismogenic 51 TrES 4 51 planetesimal 51 ferric oxides 51 deglaciation 51 megafauna 51 Rossby waves 51 Amundsen Sea 51 oceanic crust 51 forams 51 Laramidia 51 asteroid impacts 51 paleomagnetic 51 interglacial periods 51 Baptistina 51 Neutron stars 51 Holocene epoch 51 Phanerozoic 51 Charcot Island 51 Late Cretaceous Period 51 Noachian era 51 volcanic islands 51 Tunguska meteorite 51 Kermadec Arc 51 glacier calving 51 spicule 51 substorm 51 oceanic plates 51 Yellowstone caldera 51 magma chambers 51 Crozet Islands 51 reef corals 51 coccolithophores 51 Permian extinction 51 submarine volcanoes 51 Mud volcanoes 51 Palaeocene Eocene Thermal Maximum 51 equatorial plains 51 ancient lava flows 51 Ice Age glaciers 51 Younger Dryas 51 solar nebula 51 Greenland glacier 51 Pleistocene Age 51 underwater volcanos 51 tropical glaciers 51 Alfred Wegener 51 refugia 50 Cayman Trough 50 H. habilis 50 Martian craters 50 subducted 50 Earth crust 50 Neanderthals Homo neanderthalensis 50 asthenosphere 50 volcanism 50 volcanoes erupt 50 steppe mammoth 50 sauropodomorphs 50 soliton 50 megafaunal 50 southern latitudes 50 fossilized footprints 50 Warmer seas 50 genetic lineages 50 Alpine glaciers 50 Bose Einstein condensates 50 Gakkel Ridge 50 lava tubes 50 Weddell Sea 50 mya 50 basaltic rocks 50 thermohaline circulation 50 Hesperian epoch 50 megafauna extinction 50 seafloor sediments 50 Pleistocene Ice Age 50 clathrates 50 tectonic boundary 50 tectonic stresses 50 Helheim Glacier 50 Murchison meteorite 50 megadroughts 50 single celled microbes 50 downwelling 50 Eurasian tectonic plates 50 subduction 50 Cascadia fault 50 icy comets 50 meteorite impacts 50 tectonic plate boundary 50 tropopause 50 circumstellar 50 Milankovitch cycles 50 Chicxulub 50 Chazy Reef 50 icesheet 50 craton 50 receding glaciers 50 molten magma 50 Nares Strait 50 Woolly mammoths 50 fearsome Tyrannosaurus rex 50 Agulhas Current 50 tectonics 50 Acanthostega 50 moonlet 50 bony fishes 50 Miocene epoch 50 proto planetary disk 50 glacier melts 49 brittle deformation 49 Scientists theorize 49 tectonically 49 Jurassic Period 49 microbial ecosystems 49 planetary embryos 49 biogeographical 49 Jakobshavn Isbrae 49 compressional 49 protoplanetary disk 49 hunter gatherer populations 49 Orcus Patera 49 Mount Mazama 49 Quaternary Period 49 Krakatoa eruption 49 towering icebergs 49 backboned animals 49 primate lineage 49 gaseous planet 49 earliest hominid 49 interstellar dust grains 49 planets orbits 49 Tharsis Montes 49 Beringia 49 terrestrial ecosystems 49 iridium layer 49 lavas 49 sedimentary deposits 49 Plesiosaurs 49 volcanic magma 49 Cumbre Vieja volcano 49 Hellas Basin 49 Late Triassic 49 meteoroid 49 Neanderthal extinction 49 magnetic dynamo 49 Petermann glacier 49 gravitational interactions 49 sediments deposited 49 YORP effect 49 planktonic 49 topological defects 49 Puijila 49 Homo sapiens evolved 49 supervolcano 49 Cretaceous Tertiary KT 49 deepwater corals 49 protoplanet 49 superheavy elements 49 marine sediments 49 Cenozoic Era 49 tectonic plate 49 placentals 49 extinct volcanoes 49 Jovian atmosphere 48 palaeo 48 marine ecologists 48 gorillas chimps 48 iceberg calving 48 horned dinosaurs 48 unicellular organisms 48 crustal deformation 48 carbonaceous chondrite 48 hypervelocity stars 48 atmospheric circulation 48 underwater volcanoes 48 hominid species 48 ejecta blanket 48 Brigham Grette 48 warm interglacial periods 48 mantle convection 48 crustal 48 Oligocene epoch 48 flatfishes 48 warm interglacial 48 Sermilik Fjord 48 archosaurs 48 Kazantzidis 48 oceanic lithosphere 48 hydrosphere 48 conodonts 48 subpolar 48 Shatsky Rise 48 earliest tetrapods 48 Gravitational waves 48 blue supergiant 48 Paranthropus 48 Io volcanoes 48 climate modellers 48 Greenland icecap 48 Mount Kilimanjaro glaciers 48 evolutionary lineages 48 Antarctic icesheet 48 subduction zone 48 geodynamic 48 mammal extinctions 48 Kay Bidle 48 planetary atmospheres 48 Last Glacial Maximum 48 Milankovitch 48 Greenland glaciers 48 Tuamotu Archipelago 48 magnetotail 48 midlatitudes 48 glaciers 48 Ediacaran 48 nucleobases 48 Syrtis Major 48 atmospheric CO2 levels 48 megaflood 48 Ronne Ice Shelf 48 basaltic rock 48 ocean upwelling 48 hominins 48 tidal tails 48 lowermost mantle 48 Great Aletsch Glacier 48 equatorial waters 48 multi decadal 48 runaway thermonuclear 48 atmospheric ozone 48 Toba eruption 48 reef ecosystems 48 cosmic strings 48 tectonic faults 48 gravitational interaction 48 polar icecap 48 biosignatures 48 glacial interglacial 48 rotational axis 48 Whillans Ice Stream 48 thermonuclear reactions 48 mantle lithosphere 48 oceanic currents 48 cryosphere 48 braincase 48 magmas 48 axial tilt 48 Ares Vallis 48 Martian volcanoes 48 mica sheets 48 placental mammal 48 oceanic islands 48 boreal regions 48 Paleozoic Era 48 temperate latitudes 48 Siberian mammoths 48 Younger Dryas cold 48 vortices 48 interstellar cloud 48 Martian crust 48 outlet glaciers 48 Tropical Storm Neki 48 interglacial period 48 Gigantopithecus 48 tetrapods 48 comet nuclei 48 phyllosilicate 48 Mariana Arc 47 hydrological cycle 47 Tropical Storm Karina 47 cobalt atoms 47 phyllosilicates 47 silicon atoms 47 Cryogenian period 47 Surtsey 47 phytoplankton bloom 47 hypoxic zone 47 carbonate globules 47 Schmittner 47 igneous rocks 47 alpine glaciers 47 invertebrate animals 47 Devonian Period 47 Cambrian Period 47 Trojan asteroids 47 planemos 47 hydrothermal fluids 47 methane seeps 47 vesper bats 47 Antarctic Peninsula 47 sedimentary basins 47 Terre Adelie 47 WASP #b 47 equatorial regions 47 evaporite deposits 47 winged dinosaur 47 supernovae explosions 47 tiny single celled 47 tetrapods evolved 47 planet magnetosphere 47 Maunder minimum 47 AB Aurigae 47 dense clumps 47 eolian 47 megafloods 47 cyclonic circulations 47 Valles Marineris 47 tidally 47 Sunda Trench 47 Palaeozoic era 47 ocean eddies 47 isostatic rebound 47 Larsemann Hills 47 Sumatra Andaman earthquake 47 Late Miocene 47 Late Pleistocene 47 Chasma Boreale 47 moonlets 47 latitudinal 47 Hot Jupiters 47 Homo erectus evolved 47 branching corals 47 amorphous calcium carbonate 47 magmatism 47 terranes 47 circumstellar disk 47 blue straggler 47 stratospheric clouds 47 H. sapiens 47 atmospheric circulations 47 turbidites 47 cosmic ray observatory 47 Kilimanjaro glaciers 47 gyre 47 interconversion 47 interstellar dust clouds 47 Kuiper belt objects 47 dynamical evolution 47 oceanic trenches 47 Appy Sluijs 47 supercooled droplets 47 erosional 47 crinoids 47 retreating glaciers 47 geodynamics 47 moons orbiting 47 placental mammals 47 Saharan Desert 47 plankton blooms 47 trophic cascades 47 planetary orbits 47 tidewater glaciers 47 Tropical Storm Chantal 47 spacecraft flyby 47 mesosphere 47 prokaryotes 47 Kerguelen Plateau 47 sulfate aerosols 47 single celled organisms 47 meteorite bombardment 47 felsic tuff 47 thermal vents 47 subglacial lake 47 galactic halo 47 CoRoT satellite 47 Earths crust 47 Heterodontosaurus 47 mud volcanoes 47 Pierre Auger Observatory 47 carbonate minerals 47 colonial empires 47 seafloor sediment 47 megathrust quake 47 planetary magnetospheres 47 Ithaca Chasma 47 bonebed 47 rifted 47 Madden Julian Oscillation 47 Jupiter moon Io 47 lobe finned fish 47 mineralizing fluids 47 mammal fossils 47 Ice Ages 47 Saturnian 47 weakly interacting 47 Cretaceous periods 47 mineral olivine 47 geochronology 47 multicellular animals 47 nanobubbles 47 Coral bleaching 47 necked dinosaur 47 plasmasphere 47 animal phyla 47 Jupiter gravitational pull 47 hominid evolution 47 Neanderthals roamed 46 Homo ergaster 46 advection 46 australopithecines 46 ocean currents 46 phytoplankton blooms 46 neutrino mass 46 anticyclonic 46 silicate dust 46 Magellanic Stream 46 McMurdo Dry Valleys 46 subsurface ocean 46 Bouvet Island 46 sedimentary layer 46 warmings 46 shifting tectonic plates 46 midlatitude 46 wrinkle ridges 46 circumstellar disks 46 comets orbiting 46 landmass 46 C4 grasses 46 Schellart 46 GJ #b [001] 46 springtime ozone 46 Afar desert 46 Planitia 46 biomineralization 46 granitoids 46 H. erectus 46 elliptical galaxy 46 mass migrations 46 Jakobshavn 46 mammoths 46 calcite 46 lobe finned fishes 46 COROT 7b 46 Little Ice Age 46 binary asteroids 46 undersea plumes 46 fermion atoms 46 Snowball Earth 46 Upper Paleolithic 46 biotopes 46 coral skeletons 46 microbial organisms 46 solitons 46 North Pacific Gyre 46 Neanderthal fossils 46 interferogram 46 tectonic activity 46 basaltic magma 46 extinct mammal 46 geochemists 46 martian meteorites 46 Late Jurassic 46 inner moons 46 graphite whiskers 46 subduction zones 46 Cretaceous Period 46 Iapetus 46 exosphere 46 icefields 46 spiral nebulae 46 gravitational tides 46 KT extinction 46 thrust faulting 46 active volcanism 46 cometary impacts 46 coronal loops 46 Middle Awash 46 tholins 46 exoplanetary 46 elastic deformation 46 fissure eruption 46 Indian Ocean Dipole 46 chlorine monoxide 46 nucleons 46 polar latitudes 46 Tauri Sb 46 moon Io 46 Permian Triassic boundary 46 Eocene Oligocene 46 ostracods 46 Nankai Trough 46 Cambrian Explosion 46 hydrate crystals 46 impactors 46 Sunda trench 46 anthropogenically 46 Homo neanderthalensis 46 stony meteorites 46 Castorocauda 46 neutrino telescope 46 sediments 46 airglow 46 Galileo spacecraft 46 dwarf hippos 46 Noctilucent clouds 46 icebergs 46 Eric Rignot 46 stratospheric ozone 46 prebiotic soup 46 VB #b 46 ULIRGs 46 anticlines 46 Blaire Van Valkenburgh 46 Jovian moon 46 magnetic reconnection 46 gravitational pulls 46 Drygalski 46 Rugops 46 ignimbrite 46 Eocene Epoch 46 golden toad 46 elongated orbits 46 Early Cretaceous 46 Submillimeter Array 46 Mount Bosavi 46 interglacial 46 Paranthropus robustus 46 Laguna Salada fault 46 Porites 46 basalt lava 46 hunter gatherer tribes 46 tabular icebergs 46 heliosheath 46 Martian dunes 46 Antarctic Circumpolar Current 46 decoherence 46 Homo antecessor 46 sulfate minerals 46 scarps 46 meteoritic material 46 sunlike star 46 sea hydrothermal vents 46 genus homo 46 moon gravitational pull 46 sinistral 46 Ulysses spacecraft 46 Pleistocene epoch 46 tidewater glacier 46 terrestrial mammals 46 proton antiproton 46 Polynesian islands 46 glacial meltwater 46 volcano lava dome 46 Middle Paleolithic 46 astrophysical objects 46 microcracks 46 Toutatis 46 Chicxulub asteroid 46 Mesozoic mammals 46 foraminifera 46 Homo species 46 Late Cretaceous 46 Subduction zones 46 equatorial bulge 46 amplifying feedbacks 46 magma chamber 46 Atlantic Gyre 46 biogeochemical cycles 46 equatorial 46 circular orbits 46 radar interferometry 46 HARPS instrument 46 stromatolite 46 dinosaur extinction 46 Planetary nebulae 46 poleward shift 46 crustal rocks 46 Hunt Ice Shelf 46 nomadic hunter gatherers 46 trophic cascade 46 Mesozoic 46 avian dinosaurs 46 single celled microorganisms 46 ecotypes 46 glacial retreat 46 ocean sediment cores 46 Dromomeron 45 convection currents 45 KBOs 45 melting permafrost 45 Arctic Oscillation 45 prevailing westerly winds 45 matter antimatter asymmetry 45 crystallites 45 intraplate 45 Laetoli 45 multi celled 45 shelves fringing 45 glacier 45 icefield 45 Asilisaurus 45 post perovskite 45 cyclonic storms 45 galactic magnetic 45 feathered dinosaurs 45 barred owls migrated 45 megathrust 45 planetwide 45 subseafloor 45 iron fertilization 45 thawing tundra 45 anticyclone 45 Sagittarius dwarf galaxy 45 Eurasian plates 45 Saqqaq 45 Equatorial Pacific 45 Palaeozoic 45 Mesozoic era 45 silicate minerals 45 terrestrial mammal 45 Kuiper Belt object 45 Nectocaris 45 auklets 45 Late Paleozoic 45 aseismic 45 rotating neutron stars 45 panspermia 45 morphological evolution 45 sterile neutrino 45 prebiotic molecules 45 neutralinos 45 Late Devonian 45 gravitational radiation 45 superstrings 45 volcanic lava flows 45 Tiktaalik roseae 45 reef fishes 45 heavily cratered 45 austral summer 45 Tropical Storm Georgette 45 abyssal plain 45 polar mesospheric clouds 45 Comet Halley 45 Saharan dust 45 Europasaurus 45 receding glacier 45 giant squid Architeuthis 45 paleoclimatologists 45 Ventastega 45 Antarctic peninsula 45 megathrust earthquakes 45 landforms 45 fissions 45 Aleutian Chain 45 mid latitudes 45 Evolutionary biologists 45 Glaciologists 45 glacial earthquakes 45 brachiopods 45 glacial melting 45 HM Cancri 45 Great Oxidation Event 45 ceratopsian 45 yardangs 45 megathrust earthquake 45 Volcanic eruptions 45 Antarctic Ice Shelf 45 interferograms 45 stromatolites 45 red colobus 45 Alfven waves 45 Nili Fossae 45 steering currents 45 meridional flow 45 Ediacaran Period 45 mid Pliocene 45 SMBHs 45 filamentary 45 Antarctica 45 massifs 45 Edith checkerspot butterfly 45 Drygalski ice tongue 45 SMBH 45 mountain glaciers 45 violent faction Tanzim 45 La Nina pattern 45 Martian crater 45 melting glacial 45 thermal gradient 45 Sesia Valley 45 asteroidal 45 electron diffusion 45 smectite 45 ocean gyres 45 deca BDEs 45 bdelloid rotifers 45 Basilosaurus 45 planet Gliese #c 45 Weiqing Han 45 ionized hydrogen 45 Oort cloud 45 Nikku Madhusudhan 45 Earth radii 45 Australopithecus africanus 45 solar minima 45 Computer simulations 45 lunar magma 45 Auger Observatory 45 H. heidelbergensis 45 volcano sedimentary sequences 45 Saturn outermost ring 45 seabed sediments 45 protists 45 polarisations 45 protoplanetary 45 felsic dike 45 Anthony Barnosky 45 melting icebergs 45 dustier stormier atmosphere 45 multicellular 45 termite mounds 45 Genyornis 45 Mott insulators 45 tropical latitudes 45 methanogenesis 45 Rignot 45 Hanny Voorwerp 45 sauropod dinosaurs 45 Pacific Decadal Oscillation PDO 45 semidesert 45 eukaryote 45 Argentine ants 45 Linheraptor 45 Late Ordovician 45 parabolic arcs 45 subducting plate 45 Klekociuk 45 proto cluster 45 basalts 45 Cretaceous extinction 45 binary asteroid 45 Tropical Storm Elida 45 strangelets 45 icy crust 45 geological epoch 45 glacial melt 45 dinosaur species 45 Patagonian Andes 45 undersea volcanic 45 galactic cannibalism 45 ivory flutes 45 colliding tectonic plates 45 bdelloids 45 supercell storms 45 Sarahsaurus 45 fossilized creatures 45 graphene sheets 45 Aardonyx 45 runaway greenhouse 45 cobalt atom 45 Ice Shelf 45 UB# Xena 45 silicate rocks 45 spatial scales 45 magnetopause 45 bryozoans 45 molten droplets 45 Mandushev 45 symbioses 45 mega fauna 45 long necked sauropod 45 superstorms 45 geology paleontology 45 Hominids 45 temperate zones 45 Martian meteorites 45 hydrothermal vent 45 microcephalin 45 Russia Kamchatka Peninsula 45 intermolecular forces 45 terrestrial vertebrates 45 explosive volcanism 45 magnetic substorms 45 fossilisation 45 moon Mimas 45 SpaceX splashed 45 biogeochemical 45 Hans Peter Uerpmann 45 quasicrystal 45 electron pairs 45 Sicily Mount Etna 45 permafrost thaws 45 legged carnivores 45 theropod 45 stony corals 45 Amazonian rainforests 45 earth crust 45 rotifer 45 sodium atoms 45 antarctic 45 Hellas Planitia 44 extrasolar 44 magnetotactic bacteria 44 Paleozoic 44 basaltic lava 44 martian atmosphere 44 yedoma 44 Velicogna 44 Kelvin Helmholtz 44 seismograms 44 merging galaxies 44 coastal mangrove forests 44 Mauna Loa volcano 44 paleoclimate 44 tropics 44 teleconnections 44 andesitic rocks 44 Earth biosphere 44 experimentally demonstrated 44 gravitational wobbles 44 glacial interglacial cycles 44 metamorphic rocks 44 Earth magnetosphere 44 exo planets 44 climatic variability 44 Pleistocene 44 equatorial latitudes 44 thermal gradients 44 volcanic craters 44 Wolf Rayet star 44 exciton 44 nanobacteria 44 mitochondrial Eve 44 sedimentary strata 44 prehistoric lizard 44 Natalie Mahowald 44 Icadyptes 44 lava flows 44 carbonate sediments 44 zodiacal dust 44 gravitational slingshot 44 sulfidic 44 multi celled organisms 44 katabatic winds 44 Eurasian landmass 44 synchrotron x ray 44 dinosaur lineages 44 dextral 44 Ordovician 44 chondrites 44 claystone 44 Taung child 44 Pacific Subtropical Gyre 44 orbited Jupiter 44 quantum particles 44 ancient Polynesians 44 quantum tunneling 44 VY Canis Majoris 44 Louisiana coastal marshes 44 nebular 44 proton proton 44 albedo feedback 44 Ontario Lacus 44 millisecond pulsar 44 Corot 7b 44 choanoflagellates 44 interannual variability 44 ancient Mayan civilization 44 coolings 44 Type Ia supernova 44 Scambos 44 temperate forests 44 Pleistocene era 44 Shiveluch 44 Archaean 44 mesoscale 44 penitentes 44 fault scarps 44 Voyager spacecraft 44 Paleogene 44 Cretaceous Tertiary 44 Thawing permafrost 44 Eyjafjoell volcano 44 upwellings 44 photosynthetic microbes 44 electronic excitations 44 large oceanic plateaus 44 Quaternary 44 Kihansi spray toad 44 volcanic ridges 44 membrane pores 44 Permian Triassic extinction 44 earliest hominids 44 Siberian permafrost 44 El Nino Southern Oscillation 44 Bose Einstein condensate 44 infalling gas 44 trilobites