Related by context. All words. (Click for frequent words.) 67 carboniferous 64 Cenozoic Era 63 Jurassic Period 63 Cambrian Period 63 Triassic Period 62 Cretaceous Period 61 Eocene Epoch 61 Devonian Period 61 Paleozoic Era 60 Iguanodon 60 dinosaurs roamed 60 Neoproterozoic 60 Laetoli 60 Permian Period 60 Ediacaran 59 Ediacaran Period 59 Neogene 59 Paleozoic era 59 Genyornis 59 Carboniferous 58 Mesozoic Era 58 cretaceous 58 earliest hominid 58 titanosaurs 58 Late Jurassic 57 Pleistocene Epoch 57 Hadean 57 Late Cretaceous 57 Laramidia 57 pliosaur ferocious predator 57 Miocene epoch 57 Laetoli Tanzania 57 Late Devonian 56 Early Cretaceous 56 Tertiary Period 56 supercontinent Pangaea 56 Triassic Jurassic 56 Oligocene epoch 56 Pleistocene epoch 56 Late Triassic 56 iridium layer 56 Cenozoic era 56 ornithopod 56 anamensis 56 birdlike dinosaur 56 radiocarbon dated 56 Middle Awash 56 Cretaceous 56 Palaeozoic era 55 Laurasia 55 Noachian era 55 ancient supercontinent 55 Ediacara 55 angiosperm 55 fossil 55 Mesozoic era 55 ancestral Puebloan 55 sedimentary layers 55 Miocene Epoch 55 glaciers retreated 55 Eocene epoch 55 Doushantuo Formation 55 mammal lineages 55 coral skeletons 54 sauropod dinosaur 54 stromatolite 54 mammal fossils 54 Gigantopithecus 54 known bird Archaeopteryx 54 Gondwanan 54 Panderichthys 54 lobe finned fishes 54 Stegodon 54 Archaean 54 glaciers receded 54 Ordovician extinction 54 exo planet 54 Mesolithic 54 Late Cretaceous Period 54 genus homo 54 Pleistocene Ice Age 54 fossilized pollen 54 Cretaceous periods 54 Cryogenian 54 crinoids 54 trilobites 54 Indricotherium 54 Pleistocene 54 Sarahsaurus 54 humans Homo sapiens 54 Argentinosaurus 54 Homo sapiens evolved 54 Woolly mammoths 53 bird Archaeopteryx 53 southern supercontinent 53 Gondwanaland 53 fossils unearthed 53 Permian extinction 53 Toba eruption 53 ramidus 53 Bristlecone pines 53 Fossilised 53 microfossil 53 Koobi Fora 53 Tawa hallae 53 carbon isotope ratios 53 Dig unearths 53 cratons 53 long necked sauropods 53 terrestrial mammals 53 ostracods 53 Upper Palaeolithic 53 Appy Sluijs 53 bony fishes 53 mallee fowl 53 sauropodomorphs 53 Pleistocene Age 53 Precambrian 53 Anchiornis huxleyi 52 palaeo 52 marine sediments 52 Paleocene Eocene Thermal Maximum 52 Homo ergaster 52 faunas 52 Early Archaic 52 Upper Paleolithic 52 bristlecone pine 52 Tunguska meteorite 52 macrofauna 52 ornithischians 52 Neolithic Age 52 palaeontological 52 Heterodontosaurus 52 multi celled 52 Noachian 52 herbivorous dinosaurs 52 Paleocene 52 crinoid 52 Middle Pleistocene 52 Ice Age mammals 52 microfossils 52 Quaternary Period 52 Plio Pleistocene 52 dawn redwood 52 Metasequoia 52 nicknamed Ardi 52 steppe bison 52 terrestrial vertebrate 52 prehistoric 52 paleomagnetic 52 bristlecone pines 52 ankylosaur 52 mammoths roamed 52 glaciers melted 52 Lark Quarry 52 geochronology 52 Turiasaurus 52 planktonic foraminifera 52 T. hallae skeletons 52 nomadic hunter gatherers 51 cenospheres 51 seafloor sediments 51 dinosaurs 51 fossilized 51 upland forests 51 fossilized dinosaur dung 51 H. habilis 51 Late Paleozoic 51 Pliocene epoch 51 tyrannosaurids 51 glacial geology 51 meteorite bombardment 51 seabed sediments 51 Cenozoic 51 megafauna 51 placental mammals 51 Prototaxites 51 forams 51 carbon isotopes 51 Late Miocene 51 Paranthropus robustus 51 Paleolithic Age 51 Wollemi pine 51 Sphagnum 51 partial skeleton 51 fossilized dung 51 paleoenvironmental 51 bonebed 51 sedimentary deposits 51 Pleistocene Era 51 Paleogene 51 Phanerozoic 51 carbonaceous material 51 Paleo Indian 51 basaltic rocks 51 tigers roamed 51 fossilized creatures 51 Mesozoic mammals 51 boreal regions 51 Asilisaurus 51 Palaeolithic 51 Repenomamus 51 shell midden 51 prehistorical 51 Pliocene 51 dromaeosaurs 51 hydrated silica 51 Dromomeron 51 Guanlong wucaii 51 Raptorex kriegsteini 51 Lengai 51 supercontinent 51 Monks Mound 51 terra preta 51 paleoecology 51 liverworts 51 long necked sauropod 51 multicellular creatures 51 distant supernovas 51 ancient hominid 51 angiosperms 51 Paleo Indians 51 Ontario Lacus 51 geological strata 50 A. ramidus 50 Europasaurus 50 Tarbosaurus 50 coprolites 50 Middle Paleolithic 50 Cryogenian period 50 Rancho La Brea 50 zircon crystals 50 Gryposaurus monumentensis 50 hominid fossil 50 hominin species 50 Cretaceous Paleogene boundary 50 Navajo Sandstone 50 Paranthropus 50 Mistaken Point 50 photosynthetic organisms 50 Early Bronze Age 50 Early Cretaceous Period 50 oxygen isotope ratios 50 fossils 50 mastodon tusk 50 mighty T. rex 50 Paisley Caves 50 Burgess Shale 50 biodiverse ecosystems 50 abyssal plain 50 Linheraptor 50 Permian Triassic 50 Zalasiewicz 50 stromatolites 50 hominid footprints 50 Riversleigh 50 Oviraptor 50 Radiocarbon dating 50 radiometric dating 50 mosasaurs 50 dense woodlands 50 phyllosilicate 50 tallest redwood 50 Homo heidelbergensis 50 Maastrichtian 50 hominoid 50 chondritic meteorites 50 woolly rhinos 50 Cambrian explosion 50 mastodons roamed 50 curved tusks 50 Paleolithic Era 50 Petrified wood 50 Late Pleistocene 50 radioactive nuclei 50 Younger Dryas 50 Noachian period 50 trilobite fossils 50 Mapusaurus roseae 50 terrestrial vertebrates 50 carbonaceous chondrite 49 sedimentary rock 49 Gobero 49 mya 49 Norte Chico 49 Hesperian Epoch 49 evaporite deposits 49 sediba 49 ammonite 49 rubbly 49 radiocarbon dating 49 PancakeCroc 49 dromaeosaurid 49 Jaekelopterus 49 supercontinent Gondwana 49 warm interglacial 49 Homo species 49 Brigham Grette 49 middens 49 Columbian mammoth 49 Strathcona Fiord 49 sequestering CO2 49 placental mammal 49 cinder cones 49 Herto 49 KT boundary 49 Sauropods 49 Ordovician 49 Periodical cicadas 49 habilis 49 archeologists unearthed 49 tailing piles 49 Permo Triassic 49 temperate forests 49 interglacial 49 interglacial period 49 GtC 49 CAIs 49 duckbilled dinosaur 49 isotope composition 49 oxygen isotopes 49 Sturtian 49 Yixian Formation 49 Luoping 49 Messel 49 fossilisation 49 Upper Carboniferous 49 Antarctic Dry Valleys 49 Palaeozoic sedimentary 49 Coelophysis 49 heavily cratered 49 fearsome Tyrannosaurus rex 49 Permian Triassic boundary 49 ancient Sumerians 49 Irvingtonian period 49 lunar crust 49 hominid fossils 49 pottery sherds 49 Pleistocene era 49 buffalo roamed 49 Tunguska Siberia 49 Dikika 49 fossilized dinosaur 49 Icadyptes 49 Ice Ages 49 hadrosaur 49 sediments deposited 49 Spanish Conquistadors 49 interglacial periods 49 Ardipithecus ramidus 49 Snowball Earth 49 fossilized skull 49 Ancestral Puebloans 49 burial cairns 49 lobe finned fish 49 Microraptor gui 49 spruce fir forest 49 Middle Devonian 49 hominid species 49 ferruginous 49 Puijila 49 Geologically speaking 49 abyssal plains 49 lain undisturbed 49 Late Ordovician 49 mammal extinctions 49 Liang Bua 49 megadroughts 49 harlequin frogs 49 depositional environment 49 sulfate minerals 49 Earth biosphere 49 Paleoindian 49 tuffaceous rocks 49 lake sediments 49 gigatonne 49 balsam poplar 49 karst limestone 49 eolian 49 Middle Miocene 48 conodonts 48 speleothems 48 Transantarctic Mountains 48 radiocarbon dates 48 strontium isotope 48 Homo neanderthalensis 48 Hadrosaur 48 Spinosaurus 48 Ice Age beasts 48 shell middens 48 Acanthostega 48 marine reptile 48 coprolite 48 mitochondrial Eve 48 Moya Sola 48 radiocarbon 48 Mesozoic 48 supertree 48 Ardipithecus 48 gracile 48 vertebrate fossils 48 ape ancestors 48 Abydosaurus 48 plesiosaurs 48 interstellar dust clouds 48 evaporite 48 marine reptiles 48 piñon pines 48 dino bones 48 faunal 48 dinosaur species 48 extinct reptiles 48 economically extractable 48 horned dinosaur 48 avian dinosaurs 48 semidesert 48 Egyptian pharaohs 48 placentals 48 Eocene 48 Junggar Basin 48 predatory dinosaurs 48 Woolly mammoth 48 Psittacosaurus 48 H. erectus 48 megalodon 48 backboned animals 48 nitrogen isotopes 48 called lobate scarps 48 bristlecones 48 sulfur isotopes 48 Ordovician limestone 48 constellation Vulpecula 48 SN #/#/# [002] 48 Auctioneer T. rex 48 glacial boulder 48 brachiopods 48 Soumber 48 Triassic 48 Poinar 48 Chert 48 Puertasaurus 48 Homo antecessor 48 mammoths 48 Aureococcus 48 Chazy Reef 48 Lower Cretaceous 48 Sauropod 48 coccolithophores 48 species Ardipithecus ramidus 48 Polycyclic aromatic hydrocarbons 48 humid tropics 48 crurotarsans 48 Hohle Fels Cave 48 Australopithecus sediba 48 ichthyosaur 48 feathered dinosaur 48 temperate grasslands 48 Wollemi pines 48 subaqueous 48 lunar equator 48 Cretaceous Tertiary boundary 48 fossilized remains 48 bryozoans 48 lunar maria 48 Chalcolithic 48 arsenate 48 Gohar Tepe 48 Plate tectonics 48 sagebrush steppe 48 periodical cicadas 48 Shennongjia 48 G#.# +#.# 48 Neolithic Period 48 prehistory 47 Inca civilization 47 carbonaceous shales 47 Tianyulong 47 glaciation 47 depositional environments 47 Sahelanthropus 47 legged meat eaters 47 sauropod dinosaurs 47 Ileret 47 animal phyla 47 ichthyosaurs 47 Tillamook Burn 47 Wollemi 47 extinct mammals 47 Troodon 47 basaltic magma 47 lakebed sediments 47 Preseli Hills 47 anorthosite 47 carbonaceous chondrites 47 terrestrial biosphere 47 lodgepole pine forest 47 horned dinosaurs 47 continental crust 47 Earthlike 47 carnivorous dinosaurs 47 Columbian mammoths 47 cometary material 47 clayey 47 permafrost soils 47 Konar Sandal 47 bottomland forests 47 grassy plains 47 microscopic specks 47 prehuman 47 Bristlecone Pine 47 millenniums 47 Saharan Desert 47 Willandra Lakes 47 Castorocauda 47 Dinosaur Bones Titans 47 cypress pine 47 archeopteryx 47 hominid skull 47 trilobite 47 Plateosaurus 47 glacial moraine 47 Ankylosaurus 47 steppe mammoth 47 Brusatte 47 tetrapods evolved 47 Moche culture 47 Archaic Period 47 Australopithecus anamensis 47 species Australopithecus afarensis 47 highland forests 47 drumlins 47 Jurassic Triassic 47 #BC [003] 47 Cretaceous Tertiary 47 Pachycephalosaurus 47 spinifex 47 Nazca civilization 47 maternal lineages 47 Archaeologists unearth 47 australopithecines 47 Eoraptor 47 Beringia 47 basaltic 47 Tyler Lyson 47 sauropod skulls 47 Homo sapiens 47 Semaw 47 chimps diverged 47 Syrtis Major 47 astronomer Percival Lowell 47 Snake River Plain 47 megalodon shark 47 photosynthesising 47 sunlike star 47 wet slobber 47 Jurassic era 47 Cenomanian 47 conifer forests 47 temperate latitudes 47 biogeographic 47 Paleolithic era 47 necked dinosaurs 47 Permian Triassic extinction 47 ancient Polynesians 47 Timucuan Indians 47 single celled algae 47 claystone 47 GJ#b 47 fossilization 47 Nunavut Territory coal 47 zircons 47 Dilmun civilization 47 herbivorous dinosaur 47 ancestral Puebloans 47 paleoclimatic 47 mantle convection 47 pygmy mammoth 47 terrestrial ecosystems 47 Gawis 47 eskers 47 hunter gatherer tribes 47 Cambrian Ordovician 47 Neanderthals Homo neanderthalensis 47 fossilized dinosaur bones 47 Neanderthal fossils 47 homo erectus 47 eastern cougar subspecies 47 Quaternary 47 Globular clusters 47 feathered dinosaurs 47 isotope ratios 47 Industrial Revolution 47 flood basalts 46 therizinosaurs 46 preindustrial 46 Archeologists unearth 46 coldest driest 46 Haast eagle 46 Laurentide ice sheet 46 unexplored frontier 46 woolly rhinoceros 46 isotopic composition 46 prebiotic molecules 46 anthropoid primates 46 borealis 46 sea scorpion 46 palaeolithic 46 ancient Phoenicians 46 heathlands 46 Trilobites 46 Comet Halley 46 Zhuchengtyrannus magnus 46 fossilized coral 46 silicate rocks 46 catalpa trees 46 microscopic fossils 46 single celled microbes 46 Murchison meteorite 46 Fossae 46 Altai Mountains 46 ponderosas 46 Seitaad ruessi 46 volcanic lava 46 placoderm 46 prehistoric cave 46 necked dinosaur 46 sedge meadow 46 H. sapiens 46 dwarf hippos 46 H. heidelbergensis 46 aboard HMS Beagle 46 paleontological dig 46 pupae consume 46 Fossilized bones 46 grassy savanna 46 hoofed mammals 46 preserved fossils 46 crocodiles turtles 46 dinosaur precursors 46 Cretaceous Paleogene 46 Paranthropus boisei 46 liverwort 46 radiocarbon tests 46 C4 grasses 46 Austria Gruner Veltliner 46 coniferous forest 46 isotopic analysis 46 carbonised 46 isotopic 46 Neoproterozoic era 46 Lophelia 46 frog spawn 46 Red cockaded woodpeckers 46 absorbs CO2 46 windblown sand 46 bark crevices 46 Pollen grains 46 Neanderthal bones 46 thermal vents 46 funerary rituals 46 neolithic 46 atmospheric methane 46 Mesopotamian civilization 46 Pterosaurs 46 Cambrian Explosion 46 methane CH4 46 Confuciusornis 46 earliest tetrapods 46 Nili Fossae 46 Russell Ciochon 46 phyllosilicates 46 tumulus 46 P. robustus 46 wooly mammoths 46 Albertosaurus 46 Siple Dome 46 silicate minerals 46 roseum 46 Archaeologists uncover 46 earliest hominids 46 pediment gravels 46 Pre Cambrian 46 P. boisei 46 Holocene epoch 46 Hesperian epoch 46 Cretaceous extinction 46 homo habilis 46 Lake Yoa 46 Hydrothermal vents 46 dinosaur extinction 46 sunlike stars 46 Xiphactinus 46 Quelccaya ice cap 46 carnivore species 46 supercontinents 46 Edward Drinker Cope 46 vesper bats 46 Falcarius 46 invertebrate animals 46 alluvial plains 46 Massospondylus 46 extinct woolly mammoth 46 Balhae 46 halogenated gases 46 sandstone buttes 46 paleobotany 46 biotopes 46 hominid ancestors 46 bristlecone 46 Mojoceratops 46 pre Incan 46 magmas 46 mosasaur 46 choanoflagellates 46 Plesiosaurs 46 prehistoric archaeological 46 giant squid Architeuthis 46 Polynesian settlers 46 Upper Triassic 46 Sahelanthropus tchadensis 46 Navajo sandstone 46 Chachapoya 46 datings 46 Taklimakan desert 46 cratered highlands 46 glacial interglacial 46 receding glacier 46 tectonically 46 Hominid 46 fossilized bone 46 Nicholas Conard 46 theropod dinosaur 46 understory vegetation 46 duck billed hadrosaur 46 hummocky 46 barrens 46 Sarmatian 46 gray jay 46 Paleobiology Database 46 chemosynthetic 46 bison roamed 46 smallest exoplanet 46 icebound earth 46 glowed orange 46 Denisova Cave 46 carbon cenospheres 46 chalcedonic silica 46 circumstellar disks 46 Malapa 46 Methane hydrate 46 echinoderm 46 glaciations 46 Klekociuk 46 peat lands 46 Bujang Valley 46 concretions 46 Zelenitsky 46 Kibish 45 unmineable coal seams 45 species interbred 45 protoplanetary discs 45 isotopic ratios 45 prehistoric lizard 45 mammoth tusk 45 tectonic plate movements 45 herbarium specimens 45 Dinosauria 45 ray finned 45 coyote scat 45 ancient Mayans 45 Palaeocene Eocene Thermal Maximum 45 saxifrage 45 Myr 45 saber tooth cat 45 paleobiologists 45 hippopotamus bones 45 Olduvai 45 Proterozoic 45 lunar magma 45 Devonian 45 smoker vents 45 Silurian 45 Aardonyx celestae species 45 Cuddie Springs 45 Rugops 45 woolly mammoths 45 microscopic single celled 45 hominin fossils 45 windswept slopes 45 tiny single celled 45 hadrosaurs 45 COROT 7b 45 bristlecone pine trees 45 Late Archaic 45 Australopithecus 45 dinosaur footprints 45 radiocarbon analysis 45 saline aquifers 45 Mio Pliocene 45 Gneiss 45 glacial outwash 45 KT extinction 45 volcanic vents 45 floristic 45 Denisovan 45 Paleozoic 45 chondritic 45 cyanide laced pineapples 45 seafloor sediment 45 Makovicky 45 lunar meteorites 45 intensively cultivated 45 Viking landers 45 interstellar cloud 45 Natufian 45 Chicxulub Crater 45 tadpole shrimp 45 sparsely vegetated 45 stag moose 45 Inca Empire 45 manganese nodules 45 coquina rock 45 koa trees 45 montane 45 infertile soils 45 Ancient tomb 45 paleontological discoveries 45 quartz pebble conglomerate 45 African savanna 45 genus Australopithecus 45 Indus civilization 45 blackland prairie 45 Mammuthus 45 Marmarth Research 45 fossilized skulls 45 Saqqara necropolis 45 Rabeling 45 metamorphic rock 45 lowland rainforests 45 fossilized footprints 45 Morganucodon 45 chalk grassland 45 Tenontosaurus 45 burrowing mammals 45 fossilized shells 45 oak savannas 45 Taurus Littrow 45 Radiocarbon testing 45 Creswell Crags 45 sea scorpions 45 prehistoric cavemen 45 exquisitely preserved 45 Shang dynasty 45 Dinosaur Cove 45 prehistoric mammals 45 Argentavis 45 Arctic tundra 45 aurochs 45 bottomland forest 45 Jurassic 45 conifers ferns 45 giant elephant shrew 45 Durrington Walls 45 Radiocarbon 45 bald cypress tree 45 cave stalagmites 45 permafrost melts 45 depositional 45 angiosperms flowering plants 45 Sedimentary rocks 45 IRC +# 45 biogeographical 45 Current Warm Period 45 mammoths mastodons 45 bipedal dinosaur 45 equatorial forests 45 Mojzsis 45 basalt rocks 45 Incan civilization 45 teepee rings 45 juvenile Columbian mammoth 45 multicellular animals 45 constellation Eridanus 45 dryosaurus 45 Halil Rud 45 biogenic 45 geological stratum 45 Haber Bosch 45 tarlike 45 Medieval Warm Period 45 protoplanet 45 Segmental duplications 45 grasslands woodlands 45 green anole 45 bettongs 45 Dakosaurus andiniensis 45 Dimetrodon 45 Perseus Cluster 45 mitochondrial DNA lineages 45 placer workings 45 Snapping turtles 45 Chinchorro 45 Denisova cave 45 Bighorn Basin 45 Norris Geyser Basin 45 Paleolithic 45 Fertile Crescent 45 Yellowstone caldera 45 mastodon bones 45 Tiktaalik roseae 45 pocket gophers 45 nonindigenous 45 Beardmore Glacier 45 tufa 45 mega fauna 45 Estrada Belli 45 Anasazi ruins 45 Hominids 45 millennia 45 Anthony Remijan 45 maternal ancestor 45 apelike creature 45 Hellas Basin 45 silicate mantle 45 terrestrial mammal 45 Dunkleosteus 45 VIDEO Egyptian mummies 45 volcanic pumice 45 shift methane seeps 45 A. sediba 45 Climatic Optimum 45 microscopic fungi 45 atmospheric CO2 concentration 45 hyrax 45 Middle Palaeolithic 45 winged dinosaur 45 McMurdo Dry Valleys 45 dinosaurian 45 diplodocus 45 paleo 45 Martian meteorite 45 desertified 45 Laurentide Ice Sheet 45 Varanus bitatawa 45 shadowy craters 45 decaying vegetation 45 aboveground biomass 45 Woodhenge 45 Bronze Age burial 45 Gran Dolina 45 sassafras tree 45 termite mounds 45 ferric oxides 45 dwarf hippopotamuses 45 carbon fluxes 45 Ossabaw 45 archaeo 45 Alycia Weinberger 45 Australopithecus africanus 45 Peat bogs 45 ancestors 45 Altai mountains 45 earths 45 Homo habilis 45 cypress tupelo 45 porous sandstone 45 dynamical evolution 45 Blombos Cave 45 Banerdt 45 yellow bellied marmots 45 Martian meteorites 45 Gerard Kuiper 45 hematite goethite 45 polar mesospheric clouds 45 degrees Fahrenheit warmer 45 reionization epoch 45 thermally mature 45 Lower Paleolithic 45 Jay Famiglietti 45 golden toad 45 Cretaceous sediments 45 halite 45 terminal moraine 45 petroglyphs carved 45 beetles burrow 45 Mesoproterozoic 45 Brood XIX 45 Dolores Piperno 45 megafauna extinction 45 mosses lichens 45 filamentous algae 45 Inca civilizations 44 venomous lizards 44 nebular 44 extinct mammoths 44 Guanlong 44 cicada nymphs 44 Neandertals 44 leach toxic chemicals