Related by context. All words. (Click for frequent words.) 65 Cretaceous Paleogene 62 KT boundary 62 spinels 62 Neogene 61 Cretaceous Tertiary boundary 60 stromatolite 60 geochronology 60 paleomagnetic 60 planktonic foraminifera 60 sedimentary layers 60 Neoproterozoic 59 Ordovician extinction 59 basaltic rocks 59 Chicxulub crater 59 faunas 59 Toba eruption 59 oxygen isotope 58 fossilized pollen 58 polychaete 58 sedimentary deposits 58 biogeographic 58 Chicxulub 58 quartz grains 58 tyrannosaurids 58 forams 58 foraminifera 58 geochemists 58 magmatism 58 crinoid 58 isotopic compositions 58 coprolite 58 Middle Pleistocene 58 biogeographical 57 oxygen isotope ratios 57 Ediacara 57 Quaternary 57 Phanerozoic 57 Cretaceous Tertiary KT 57 primate lineage 57 giganteus 57 Proteobacteria 57 olivine crystals 57 flood basalts 57 phylogenies 57 conodonts 57 Cretaceous Tertiary 56 speleothems 56 molecular phylogenetic 56 microfossil 56 mammillary 56 igneous rocks 56 fossils unearthed 56 holotype 56 supercontinent 56 Gondwanan 56 brachiopods 56 Middle Paleolithic 56 Fe Mn 56 coccolithophores 56 animal phyla 56 Cenozoic 56 Comet Halley 56 turbidites 56 isotope ratios 56 Paleocene Eocene Thermal Maximum 56 Zalasiewicz 56 strontium isotope 56 Permian Triassic boundary 56 Permian Triassic 56 isotope composition 56 komatiites 56 Cenozoic Era 56 Late Devonian 56 Radiocarbon 56 spherules 55 Martian meteorites 55 peridotites 55 herbivorous dinosaurs 55 diatom species 55 Woese 55 supercontinents 55 mosasaurs 55 Acropora 55 seafloor sediments 55 benthic foraminifera 55 Fig. 1b 55 lunar meteorites 55 ostracods 55 Cenozoic era 55 marine sediments 55 molecular phylogeny 55 Chicxulub impact 55 rifting 55 phyllosilicates 55 eclogite 55 Stromatolites 55 crustal thickness 55 paleoclimatology 55 Devonian Period 55 Early Cretaceous 55 microfossils 55 metazoans 55 martian meteorites 55 angiosperm 55 hydrothermal vent 54 morphological similarities 54 H. habilis 54 Late Miocene 54 interannual variability 54 depositional environment 54 Noachian 54 metazoan 54 Palaeozoic 54 Cambrian Period 54 chondritic meteorites 54 carbonate sediments 54 taxon 54 spatial variability 54 ocean sediment cores 54 lunar crust 54 circumstellar 54 Tertiary Period 54 concretions 54 sediments deposited 54 accretionary 54 Murchison meteorite 54 mantle plumes 54 presolar grains 54 magmas 54 ocean basins 54 morphologies 54 Ediacaran 54 Nectocaris 54 Sinosauropteryx 54 mtDNA sequences 54 carbon isotope ratios 54 Middle Awash 54 sulfur isotope 54 hominin species 54 trilobites 54 cratons 54 palaeo 54 terranes 54 Permian Period 54 Mg Ca 54 Oligocene epoch 54 stromatolites 54 crinoids 54 hominoids 54 Plio Pleistocene 53 Kuiper belt objects 53 Younger Dryas 53 sulfur isotopes 53 Microraptor gui 53 tetrapods evolved 53 horned dinosaurs 53 bryozoans 53 Martian craters 53 mtDNA sequence 53 Ohmoto 53 feathered dinosaurs 53 neutralinos 53 dromaeosaurs 53 lithospheric 53 Koobi Fora 53 hominoid 53 robustus 53 Last Glacial Maximum 53 reef corals 53 Navajo Sandstone 53 carbon spherules 53 sauropodomorphs 53 calderas 53 periodicities 53 chondrite 53 iridium layer 53 bonebed 53 Gigantopithecus 53 Castorocauda 53 gastropod 53 Heterodontosaurus 53 Osedax 53 ornithischians 53 hominid evolution 53 faunal 53 Paleocene 53 collisional 53 Chicxulub Crater 53 Mesozoic mammals 53 radiocarbon dated 53 mammal fossils 53 habilis 53 superheavy elements 53 invertebrate animals 53 Triassic Jurassic 53 IR spectra 53 ejecta 53 paleoenvironmental 53 nebular 52 Prochlorococcus 52 planetesimal 52 Iguanodon 52 seafloor sediment 52 Ice Age mammals 52 hominid fossil 52 megadroughts 52 brachiopod 52 sulfidic 52 evolutionary lineage 52 fig. S4 52 loess 52 lavas 52 Paleobiology Database 52 Arabia Terra 52 anamensis 52 spectroscopically 52 microhabitats 52 placental mammal 52 Sedimentary rocks 52 tectonically 52 Antarctic Dry Valleys 52 geminata 52 evolutionary lineages 52 glaciations 52 Fig. 1A 52 green alga 52 Permian extinction 52 isotopic signature 52 Paranthropus robustus 52 meteor impacts 52 superposed 52 landmasses 52 Maastrichtian 52 Late Triassic 52 Paleozoic Era 52 theropod dinosaur 52 carbonaceous chondrites 52 floresiensis 52 orogenic 52 igneous rock 52 basaltic 52 subducting plate 52 mineralized mafic 52 Blaire Van Valkenburgh 52 Laurasia 52 basaltic rock 52 Gondwanaland 52 musculus 52 basalts 52 protists 52 biogeochemical 52 ecotypes 52 Precambrian 52 carbon isotopes 52 Eocene Epoch 52 eclipsing binary 52 paleoecology 52 trilobite 52 branching corals 52 chondrites 52 Orrorin tugenensis 52 freshwater snails 52 Ediacara organisms 52 bolide 52 called lobate scarps 52 Argentavis 52 Permo Triassic 52 radiometric dating 52 Palaeocene Eocene Thermal Maximum 52 Brusatte 52 morphological evolution 52 NEAs 52 palaeontological 52 komatiitic 52 Appy Sluijs 52 comb jelly 52 cherts 52 meteorite fragments 52 Prototaxites 51 fossilized footprints 51 phylogenetically 51 Noachian era 51 Jurassic Period 51 stony meteorites 51 sedimentology 51 stony meteorite 51 supercolony 51 Darwin finches 51 clades 51 bony fishes 51 Tunguska meteorite 51 elemental composition 51 silicate dust 51 SN #/#/# [002] 51 Fig. 2B 51 McMurdo Dry Valleys 51 oceanic crust 51 coralline 51 Allende meteorite 51 paleobiology 51 ancient supercontinent 51 fossilized coral 51 quartz feldspar porphyries 51 Mammuthus 51 Late Ordovician 51 Acanthostega 51 merging galaxies 51 CAIs 51 Sr Ca 51 Laetoli 51 intermedius 51 Hominid 51 ostracodes 51 mud volcanoes 51 coral skeletons 51 Georges Cuvier 51 olivines 51 meteoritic 51 homologies 51 artiodactyls 51 lobate scarps 51 isotopic signatures 51 sea hydrothermal vents 51 planktonic 51 polar mesospheric clouds 51 snail shells 51 phylogeographic 51 archosaurs 51 Ichthyostega 51 theropod 51 chordates 51 sabertooth cat 51 mya 51 radiocarbon dates 51 type Ia supernova 51 genus homo 51 weakly interacting 51 trimers 51 Palaeo 51 montane 51 sengi 51 dinosaur extinction 51 Makovicky 51 birdlike dinosaur 51 microscopic fossils 51 isopods 51 ALH# 51 lava tubes 51 primitive meteorites 51 sauropodomorph 51 isotopic ratios 51 homo erectus 51 ornithopod 51 δ 51 megalodon 51 zircons 51 Stratigraphy 51 hadrosaurs 51 phyllosilicate 51 Anomalocaris 51 refugia 51 Using radiocarbon dating 51 Mammalia 51 planetary magnetospheres 51 SN #A 51 terrestrial mammals 51 Neanderthal skeletons 51 braincase 51 prokaryotes 51 crustal rocks 51 ilmenites 51 sedimentological 51 Tawa hallae 51 Phylogenetic 51 J# +# [002] 51 RS Ophiuchi 51 Caenorhabditis 51 hominid species 51 archosaur 51 YORP effect 51 heterogeneities 51 Mesozoic 51 outcropping mineralized 51 Tullis Onstott 51 carbonaceous chondrite 51 Doushantuo Formation 51 volcanism 51 A. sediba 51 paleoclimatologists 51 chondrules 50 evaporite 50 taxa 50 illite 50 dinosaur species 50 ferric oxides 50 Panderichthys 50 single celled algae 50 metamorphic rocks 50 punctate 50 Homo ergaster 50 Tiktaalik roseae 50 Kermadec Arc 50 temporal variability 50 endophytic 50 gracile 50 Martian meteorite 50 hydrothermally 50 microbial organisms 50 extrusive 50 undescribed species 50 dolomites 50 Vertebrates 50 distant quasar 50 Late Paleozoic 50 Bethany Ehlmann 50 H. floresiensis 50 silicate minerals 50 geological epoch 50 ichthyosaur 50 Carboniferous Period 50 microbial mats 50 grabens 50 previously undescribed 50 Dikika 50 crystalline silicates 50 Mousterian 50 supercontinent Pangaea 50 microbialites 50 Jenniskens 50 microcrystals 50 sterile neutrino 50 carnivore species 50 magnetic monopoles 50 osmium 50 abundances 50 greisen 50 Type Ia supernova 50 diatom 50 G#.# +#.# 50 particles WIMPs 50 Galapagos finches 50 systematics 50 necked dinosaur 50 Laurentide ice sheet 50 lowermost mantle 50 Archaean 50 Gakkel Ridge 50 Paleogene 50 Carcharhinus 50 paleoclimate 50 Paranthropus 50 partial skeleton 50 Poinar 50 cometary material 50 Bose Einstein condensation 50 siliciclastic 50 igneous 50 geophysically 50 ductile deformation 50 filamentary 50 erosional 50 Cambrian Explosion 50 silicic 50 post perovskite 50 claystone 50 Upper Paleolithic 50 coeval 50 layered ultramafic 50 fluid inclusions 50 proplyds 50 X chromosome inactivation 50 metamorphism 50 Harvati 50 branes 50 ejecta blanket 50 Linheraptor 50 isotopic 50 Henshilwood 50 geological strata 50 lithic 50 Tarbosaurus 50 tectonic plate movements 50 silicate crystals 50 diatoms 50 dinosaur genera 50 species Australopithecus afarensis 50 Gerard Kuiper 50 H. erectus 50 Sahelanthropus tchadensis 50 Doppler measurements 50 Homo neanderthalensis 50 ammonite 50 Glikson 50 Morganucodon 50 humans Homo sapiens 50 sulphide mineral 50 carbonaceous meteorites 50 asteroid impacts 50 geoneutrinos 50 supersymmetric particles 50 Fig. 2a 50 hydrated silica 50 magmatic 49 amorphous calcium carbonate 49 continental rifting 49 reef fishes 49 phenotypic differences 49 polypeptide chain 49 Laetoli Tanzania 49 benthos 49 Varanus bitatawa 49 arthropod 49 Qesem Cave 49 Gal Yam 49 astrophysical objects 49 multicellular animals 49 genetic lineages 49 aeolian 49 oligotrophic 49 Liang Bua 49 molluscan 49 lithosphere 49 carbon cenospheres 49 spiral nebulae 49 moonlets 49 C4 grasses 49 evaporite deposits 49 underwater volcanoes 49 hydrated electron 49 lapilli 49 mitochondrial genomes 49 metamorphic rock 49 ecoregions 49 endosymbiosis 49 Lophelia 49 stegosaur 49 protist 49 microscopic crystals 49 SDSS II 49 ignimbrite 49 Deccan Traps 49 deformational 49 TrES 4 49 sparticles 49 H. sapiens 49 spatial scales 49 Comparative genomics 49 ULIRGs 49 Paleoclimate 49 neutrino mass 49 comet nuclei 49 Cosmic Microwave Background 49 Kosmoceratops 49 interglacial periods 49 prokaryote 49 Loihi 49 australopithecines 49 KBOs 49 thermodynamic stability 49 spicule 49 sulphidic 49 nanobacteria 49 ocean ridges 49 Herto 49 scutes 49 microplastics 49 PSR B# +# 49 seabed sediments 49 landforms 49 earliest hominid 49 cirrus cloud 49 tetrapods 49 geodynamic 49 Columbian mammoth 49 hydrothermal venting 49 Sumatra Andaman earthquake 49 geomicrobiology 49 theropods 49 olivine 49 altitudinal 49 ophiolite 49 volcanic tuff 49 biogeography 49 continental crust 49 Cambrian explosion 49 placental mammals 49 vertebrate fossils 49 phylogenetic relationships 49 subseafloor 49 mollusk shells 49 Magnetars 49 plutons 49 lobe finned fishes 49 microscopic specks 49 infrared spectral 49 Denisovan 49 fig. S1 49 previously unstudied 49 mega fauna 49 angiosperms 49 submarine volcanoes 49 sauropod dinosaurs 49 protoplanet 49 neutrino oscillation 49 feathered dinosaur 49 Phylogenetic analysis 49 Rugops 49 African cichlid fish 49 cyanobacterial 49 supervolcanoes 49 Sinus Meridiani 49 brittle deformation 49 gabbros 49 marine invertebrates 49 paleobiologist 49 megafaunal 49 geomorphology 49 basaltic flows 49 echinoderm 49 Raman spectra 49 Quaoar 49 magnetic excitations 49 terrestrial ecosystems 49 evaporite minerals 49 extinct mammal 49 alkalic 49 hydrothermal activity 49 Ontario Lacus 49 Dromomeron 49 interstellar dust grains 49 Homo antecessor 49 Dehalococcoides 49 phyla 49 Earth biosphere 49 microbiomes 49 ramidus 49 cretaceous 49 rhyolite tuff 49 oxygen isotopic 49 planet Gliese #c 49 radula 49 noncoding RNAs 49 ultramafic intrusives 49 Stegodon 49 moonlet 49 impactors 49 rhyolites 49 Paedocypris 49 Cretaceous Period 49 sifaka 49 Reiner Gamma 49 therizinosaurs 49 glacial landforms 49 volcanic basalt 49 biosignatures 48 aragonite 48 silicate mantle 48 Scientists theorize 48 inhomogeneities 48 Great Oxidation Event 48 Upper Triassic 48 sedimentary rock 48 Paleoindian 48 gyres 48 Siberian Traps 48 volcanic sediments 48 scale invariance 48 A. ramidus 48 undersea volcanoes 48 epistasis 48 GJ #b [001] 48 sulfide deposits 48 Oort cloud 48 peridotitic 48 porphyry intrusions 48 basalt rock 48 hominid skull 48 ignimbrites 48 protoplanets 48 fossil specimens 48 Ötzi 48 isostatic rebound 48 binary quasar 48 ammonites 48 elemental abundances 48 prokaryotic cells 48 AGNs 48 Elwyn Simons 48 chordate 48 orthologous 48 Gerta Keller 48 Paleozoic 48 aboveground biomass 48 circumstellar disk 48 Bose Einstein condensates 48 Carboniferous 48 calcite 48 Middle Miocene 48 fungal genomes 48 oxygen isotopes 48 Late Archaic 48 tektites 48 komatiite 48 phenotypic variation 48 P/# A2 48 Djorgovski 48 large oceanic plateaus 48 SNR #-#.# 48 Pliocene 48 Robert Jedicke 48 Mojzsis 48 Smilodon 48 Jupiter moon Io 48 Fig. 3c 48 Pakasuchus 48 icosahedral 48 Tharsis Rise 48 Brontomerus 48 Hadean 48 Weiqing Han 48 siderite 48 stratovolcano 48 mitochondrial DNA mtDNA 48 Sauropod 48 Deccan eruptions 48 TNOs 48 Neolithic Age 48 Toutatis 48 Bullet Cluster 48 archeopteryx 48 eukaryotic organisms 48 tectonic movements 48 shell midden 48 ocean eddies 48 goethite 48 Martian volcanoes 48 H. heidelbergensis 48 intergenic 48 extinct mammals 48 magma ocean 48 marine invertebrate 48 kyr 48 Homo species 48 type Ia supernovae 48 Triassic Period 48 Astrophysical 48 fossilized dinosaur bones 48 tau neutrinos 48 planetary nebulae 48 prehistoric lizard 48 anorthosite 48 Mesoproterozoic 48 auklets 48 Van Mooy 48 coevolution 48 hunter gatherer populations 48 Ardipithecus ramidus 48 Conus 48 isotopic composition 48 sunlike stars 48 galactic clusters 48 Upper Carboniferous 48 paleoclimatic 48 polychaete worms 48 kipunji 48 Detlev Arendt 48 NASA Wilkinson Microwave 48 endospores 48 Ordovician 48 australopithecine 48 bryozoan 48 copepod 48 extinct mammoths 48 enterotypes 48 asteroidal 48 Vertebrate 48 Sahelanthropus 48 tyrannosaur 48 carbonate globules 48 C. neoformans 48 hominid fossils 48 Paranthropus boisei 48 U Th 48 Blombos 48 Milford Wolpoff 48 deglaciation 48 lunar magma 48 volcanic caldera 48 Tyrannosaurs 48 gastropods 48 hominin fossils 48 fine grained sediment 48 Milankovitch 48 evolvability 48 caecilians 48 magnetite crystals 48 glacial geology 48 Confuciusornis 48 Anthony Barnosky 48 macroscopically 48 crustal 48 P. boisei 48 cosmic strings 48 hydrothermal springs 48 Henry Harpending 48 megaflood 48 B meson 48 gene duplications 48 Kipunji 48 Pleistocene Age 48 horned dinosaur 48 Gamburtsev 48 freshwater jellyfish 48 multicellular 48 toothed whale 48 supervolcano 48 bacterial genomes 48 chimp genomes 48 Chacoan 48 radiocarbon 48 ordinary chondrite 48 striations 48 hydrated minerals 48 photosynthetic microbes 48 metagenomes 48 ceratopsian 48 craton 48 chondritic 48 biotopes 48 Asilisaurus 48 cryovolcanism 48 megafauna 48 maser emission 48 midlatitude 48 galactic disk 48 Brigham Grette 48 species Homo floresiensis 48 jovian 48 protoplanetary disks 48 protozoans 48 lake sediments 48 methanogenic 48 trans Neptunian objects 48 homochirality 48 Earths crust 48 Homo heidelbergensis 48 cirrus 48 cosmic phenomena 48 Sushil Atreya 47 microsporidia 47 Gobero 47 geochemical signature 47 calcite crystals 47 paleo 47 Morphology 47 extinct volcanoes 47 CoML 47 T.rex 47 molten magma 47 echinoderms 47 pterosaur 47 Homo sapiens evolved 47 hematite mineral 47 organism genome 47 micro meteorites 47 Torosaurus 47 Oded Aharonson 47 diffusion coefficients 47 cosmogenic 47 spectral fingerprints 47 Submillimeter Array 47 binary asteroid 47 felsic rocks 47 femora 47 Quaternary Period 47 tholins 47 marine biota 47 dipole moment 47 mesoscale 47 staghorn coral 47 interactome 47 long necked sauropod 47 vertebrate 47 Geochemistry 47 isotope fractionation 47 geologic 47 Snowball Earth 47 Cryogenian period 47 planetary geology 47 Baptistina 47 fossilisation 47 kaons 47 geomorphological 47 Cretaceous periods 47 hominid footprints 47 Thermus aquaticus 47 oceanic islands 47 melt inclusions 47 Cometary 47 explosive volcanism 47 single celled 47 exoplanetary 47 Dr Glikson 47 gigantea 47 Caloris 47 Beringia 47 cinder cones 47 Biological Invasions 47 supernova SN 47 baryonic 47 intraplate 47 thermophilum 47 Outcrops 47 subcellular compartments 47 chimpanzees Pan troglodytes 47 Rabeling 47 protozoan 47 pillow lavas 47 orthologs 47 isotopic analysis 47 Isotopic 47 electron doped 47 Gneiss 47 phreatic 47 wrinkle ridges 47 southern supercontinent 47 Rancho La Brea 47 photosynthetic organisms 47 Turiasaurus 47 basaltic lava 47 lepton 47 von Frese 47 DZero experiment 47 nanobubbles 47 basaltic magma 47 quasicrystal 47 amphipods 47 mammoths roamed 47 anisotropic 47 coralline algae 47 green alga Chlamydomonas 47 topological defects 47 interglacials 47 mudstone 47 neutrino experiments 47 Geomyces destructans 47 electron micrographs 47 mineral olivine 47 radiogenic 47 dromaeosaurid 47 noctilucent clouds 47 Tiktaalik 47 prebiotic molecules 47 multi celled 47 phylogenetics 47 Bedout 47 Middle Eocene 47 chemosynthetic 47 Neutron stars 47 momenta 47 Crustal 47 paleochannel 47 Kuiper Belt Objects 47 Neandertal 47 Luann Becker 47 reionization 47 Robin Canup 47 Valles Marineris 47 Maunder minimum 47 Balarat Project 47 Shuhai Xiao 47 Pseudo nitzschia 47 Henize #-# 47 SUSY 47 sedimentary sequences 47 Amundsen Sea 47 Martian dunes 47 supermassive 47 fossilized dinosaur 47 mantle convection 47 Russell Ciochon 47 marine ecologists 47 pyroclastics 47 roseum 47 mammalian brains 47 Malapa 47 nucleotide sequences 47 climate modellers 47 icy comets 47 tropopause 47 planemos 47 Hipparchus 47 meteorite impacts 47 Zelenitsky 47 vertebrate paleontologist 47 homo floresiensis 47 Miocene Epoch 47 Tycho supernova 47 vanadium oxide