Related by context. All words. (Click for frequent words.) 65 Ordovician extinction 65 Permian Triassic extinction 64 mass extinctions 63 Permian extinction 62 KT extinction 60 Chicxulub 60 KT boundary 60 asteroid impacts 60 mass extinction 59 Cambrian Explosion 59 Cambrian explosion 59 megafauna extinction 58 WASP #b 58 iridium layer 58 hominid species 58 Chicxulub impact 57 feathered dinosaurs 57 meteorite impacts 57 Snowball Earth 57 supervolcanoes 57 dinosaur species 57 Ediacaran 57 glaciations 56 Paleocene Eocene Thermal Maximum 56 abiogenesis 56 dinosaurs 56 Younger Dryas 56 Tunguska meteorite 56 Poinar 56 Devonian Period 56 planemos 56 supernova explosion 56 winged dinosaur 55 megafauna 55 meteor impacts 55 mammal extinctions 55 Juravenator 55 earliest tetrapods 55 SN #gy 55 Paranthropus 55 extinctions 55 meteorite bombardment 54 Tunguska explosion 54 Extinctions 54 Cryogenian period 54 Late Heavy Bombardment 54 archeopteryx 54 type Ia supernova 54 Cambrian Period 54 chytrid fungus Batrachochytrium dendrobatidis 54 placental mammals 54 supercontinent 54 Permian Period 54 ALH# 54 bird Archaeopteryx 54 Linhenykus 54 predatory dinosaurs 53 matter antimatter asymmetry 53 Ice Ages 53 habilis 53 substorm 53 multicellular 53 Maunder minimum 53 Palaeocene Eocene Thermal Maximum 53 fearsome Tyrannosaurus rex 53 QQ# 53 Chicxulub crater 53 Microraptor gui 53 Cretaceous Tertiary extinction 53 crinoids 53 sterile neutrino 53 choanoflagellates 53 Cretaceous Paleogene 53 ostracods 53 reionization 53 Higgs bosons 53 Ardipithecus ramidus 53 SN #A 53 plate tectonics 53 Corot 7b 52 exo planet 52 Cretaceous Tertiary KT 52 coronal heating 52 avian dinosaurs 52 Pluto demotion 52 Friis Christensen 52 H. floresiensis 52 protoplanets 52 Antennae Galaxies 52 mammal lineages 52 Gamma ray burst 52 Cretaceous extinction 52 pink iguana 52 tyrannosaurids 52 supervolcano eruption 52 Woese 52 meteoroid impacts 52 prokaryotes 52 Svensmark 52 gravitational interactions 52 ornithischians 52 sauropod dinosaurs 52 single celled organisms 52 hominin species 52 distant supernovae 52 Sumatra Andaman earthquake 52 Hot Jupiters 52 Higgs particle 52 Deccan volcanism 52 galactic alignment 52 archosaurs 52 angiosperms 52 Brusatte 52 Type Ia supernovas 52 Burgess Shale 52 theropod dinosaur 52 TrES 4 52 dustier stormier atmosphere 52 Gliese #g 52 greenhouse warming 52 volcanism 51 Tycho supernova 51 magnetic substorms 51 trilobites 51 Paranthropus robustus 51 earliest hominid 51 Early Cretaceous Period 51 protoplanet 51 dromaeosaurs 51 eukaryote 51 GRBs 51 Toutatis 51 mammal fossils 51 Tunguska Event 51 Type Ia supernova 51 Archean Expansion 51 long necked sauropods 51 type Ia supernovae 51 Miller Urey experiment 51 bdelloid rotifers 51 A. ramidus 51 gravitational tides 51 Cryogenian 51 Archaeopteryx 51 H. habilis 51 prebiotic molecules 51 Darwinius 51 warmings 51 glaciation 51 Cretaceous Period 51 Cretaceous Paleogene boundary 51 elliptical galaxy 51 Gigantopithecus 51 Scientists theorize 51 Eocene epoch 51 fossil 51 extrasolar planets 51 feathered dinosaur 51 Hesperian Epoch 51 evolutionary divergence 51 bolide 51 Sauropods 51 coccolithophores 51 Colony Collapse Disorder CCD 51 planetary orbits 51 icy comets 51 asteroid collisions 51 plesiosaurs 51 multicellular animals 51 Great Oxidation Event 51 comets 51 evolutionary lineage 51 astronomical phenomena 51 Toba eruption 51 Sarahsaurus 51 Gerta Keller 51 paleoecology 51 Milankovitch cycles 51 Mayan prophecies 51 Confuciusornis 51 Martian meteorite 51 magnetic monopoles 51 supercontinent Pangaea 51 Permian Triassic boundary 51 primitive organisms 51 Type 1a supernova 51 elliptical galaxies 51 supercontinents 51 cryovolcanism 51 Chicxulub asteroid 51 isopods 50 Ice Age mammals 50 extrasolar 50 dieoff 50 Pieter van Dokkum 50 exoplanets orbiting 50 herbivorous dinosaurs 50 Darwin finches 50 Martian meteorites 50 supernova explosions 50 P/# A2 50 atmospheric methane 50 T. hallae skeletons 50 biosignatures 50 high temperature superconductivity 50 extinct mammals 50 Yellowstone supervolcano 50 Heterodontosaurus 50 Linheraptor 50 Taung child 50 Murchison meteorite 50 Ardipithecus 50 asteroids comets 50 fossils 50 fossilized footprints 50 observable phenomena 50 Baptistina 50 AB Aurigae 50 volcanic eruptions 50 primate evolution 50 superstrings 50 GJ #b [001] 50 theropod dinosaurs 50 multicellularity 50 Neanderthal extinction 50 Siberian permafrost 50 interglacial period 50 Gliese #c 50 multi celled 50 vertebrate species 50 mammoths 50 Saturn rings 50 mammals 50 brightest supernova 50 Kuiper Belt object 50 Tyrannosaurs 50 Gondwanaland 50 frog deformities 50 cometary dust 50 multicellular organisms 50 supersymmetric particles 50 Ernst Mayr 50 Fermi paradox 50 carnivorous dinosaur 50 supervolcano 50 protists 50 Denisovan 50 Evolutionary biologists 50 carbonaceous chondrite 50 extinct reptiles 50 Kuiper belt objects 50 cometary material 50 microcephalin 50 ichthyosaur 50 asteroid 50 Martian craters 50 dinosaur genera 50 AGNs 50 tetrapods 50 paleomagnetic 50 long necked sauropod 50 Gravitational waves 50 birdlike dinosaur 50 KBOs 50 habitable planets 50 Homo sapiens 50 Earth biosphere 50 evolutionary adaptations 50 smallest exoplanet 50 fossilized skeletons 49 atmospheric CO2 levels 49 Comet Hale Bopp 49 TGFs 49 Eta Carinae 49 woolly mammoths 49 Hipparchus 49 Mount Tambora 49 planetesimal 49 Magnetars 49 animal phyla 49 Permian Triassic 49 Nibiru 49 Fermi Paradox 49 bacterium Yersinia pestis 49 tyrannosaur 49 Deccan eruptions 49 fossilized remains 49 Hipparcos 49 cosmic collisions 49 Woolly mammoths 49 extinct woolly mammoth 49 primate lineage 49 SCP #F# 49 cosmic phenomena 49 sediba 49 multicellular creatures 49 mammalian ancestor 49 collared peccary 49 Cenozoic Era 49 anthropoid primates 49 fossilized teeth 49 Astrophysicists 49 evolutionary biologists 49 bony fishes 49 tiny single celled 49 dynamical processes 49 Homo neanderthalensis 49 BP Psc 49 Avishay Gal Yam 49 partial skeleton 49 cosmic strings 49 placentals 49 Dakosaurus andiniensis 49 Konacki 49 panspermia 49 nanobacteria 49 macroevolution 49 Sinosauropteryx 49 Earthly contamination 49 Prototaxites 49 hypernova 49 meteorite 49 sulfur isotope 49 T.rex 49 CoRoT 7b 49 millisecond pulsar 49 Bose Einstein condensates 49 substorms 49 German astronomer Johannes 49 sunspot activity 49 Phaethon 49 morphological evolution 49 Rabeling 49 magnetar 49 hadrosaur 49 moons orbiting 49 comet McNaught 49 seafloor sediments 49 lunar crust 49 moonlets 49 tektites 49 convergent evolution 49 gamma ray burst 49 galactic mergers 49 strangelet 49 Holocene epoch 49 blight pathogen 49 strangelets 49 mosasaurs 49 Batrachochytrium dendrobatidis 49 exoplanets 49 Mass extinctions 49 bonebed 49 australopithecines 49 horned dinosaur 49 nematode Caenorhabditis elegans 49 magnetic polarity 49 Milankovitch 49 lunar meteorites 49 Cosmologists 49 vertebrate evolution 49 Late Triassic 49 Anthony Barnosky 49 Sinornithosaurus 49 cosmic ray flux 49 paleobiologist 49 morphologically distinct 49 Type Ia 49 juvenile Columbian mammoth 49 Homo genus 49 Earthlike 49 photosynthetic organisms 49 Colony Collapse 49 Argentinosaurus 49 glacial cycles 49 sauropodomorphs 49 fossilization 49 Wolszczan 49 V# Mon 49 single celled 49 globular clusters 49 continental drift 49 extinct mammal 49 Hadean 48 NASA Voyager spacecraft 48 Giovanni Cassini 48 hydrothermal explosions 48 Triassic Period 48 carnivorous dinosaurs 48 metazoan 48 hominid fossils 48 meteorite fragments 48 paleoclimate 48 particle colliders 48 megadroughts 48 hominid fossil 48 Theropods 48 Gliese #d 48 Einstein relativity theory 48 fungal genomes 48 atmospheric carbon dioxide 48 Higgs boson particle 48 Nectocaris 48 comets orbiting 48 Earthlike planets 48 God Particle 48 Paleozoic era 48 Europasaurus 48 Martian volcanoes 48 carbonate globules 48 necked dinosaur 48 sauropods 48 wooly mammoths 48 magnetars 48 Gaensler 48 astronomical alignments 48 H. erectus 48 floresiensis 48 comet 48 fossil skeleton 48 dinosaur lineages 48 G#.# +#.# 48 prehuman 48 cataclysmic eruption 48 Nomura jellyfish 48 Kuiper Belt Objects 48 Prochlorococcus 48 Abydosaurus 48 Majungatholus 48 freshwater jellyfish 48 interglacial periods 48 antihydrogen atoms 48 millisecond pulsars 48 carbonaceous chondrites 48 primate fossil 48 Sinervo 48 Antarctic ozone 48 runaway thermonuclear 48 RS Ophiuchi 48 Apatosaurus 48 rocky planets 48 endosymbiosis 48 crurotarsans 48 megaquakes 48 protist 48 honey bee colonies 48 Antarctic Dry Valleys 48 prehistoric crocodile 48 trilobite 48 dinosaur specimens 48 Argentavis 48 pulsar 48 Anomalocaris 48 meteorites 48 Phoebe orbits 48 earliest hominids 48 dwarf hippos 48 A. sediba 48 cosmic rays 48 colugos 48 moon gravitational pull 48 Comparative genomics 48 H. sapiens 48 flood basalts 48 Caltech astronomer 48 ultraluminous galaxy 48 Percival Lowell 48 nucleosynthesis 48 climate modellers 48 galactic collisions 48 superheavy elements 48 Pterosaurs 48 Kepler #b 48 anamensis 48 atmospheric aerosols 48 Neandertals 48 intrinsic brightness 48 gamma ray bursts 48 polyploidy 48 Spinosaurus 48 orbited Jupiter 48 neighboring Andromeda galaxy 48 mammalian genomes 48 interstellar molecules 48 colliding galaxies 48 planets 48 megafaunal 48 antiparticle 48 Oligocene epoch 48 green alga Chlamydomonas 48 neutralinos 48 Darwin Dilemma 48 diplodocus 48 Homo floresiensis 48 ape ancestors 48 Mesozoic era 48 stony meteorite 48 radiometric dating 48 Pleistocene epoch 48 Paranthropus boisei 48 geochemists 48 Late Jurassic 48 quasars 48 asteroidal 48 spiny anteater 48 phyllosilicates 48 Oort cloud 48 deadly chytrid fungus 48 hadrosaurs 48 Henize #-# 48 therizinosaurs 48 carbon dioxide concentrations 48 saber toothed tigers 47 Neanderthal genes 47 Apophis asteroid 47 exoplanetary 47 Martian rocks 47 Upsilon Andromedae 47 saber tooth tigers 47 Massospondylus 47 cosmologists 47 supernovas 47 Torosaurus 47 planet magnetosphere 47 supernova 47 tyrannosaurs 47 impactors 47 microfossils 47 Genyornis 47 subatomic particle 47 Kevin Padian 47 meteoroid 47 terrestrial ecosystems 47 whitebark pines 47 species Homo floresiensis 47 Gondwanan 47 martian meteorites 47 asteroids 47 protoplanetary disk 47 amphibian declines 47 Kuiper belt object 47 diatoms 47 Puijila 47 gravitational microlensing 47 bdelloid 47 invertebrate animals 47 journal Geology 47 Mapusaurus 47 cosmological theories 47 Homo sapiens evolved 47 manmade greenhouse gases 47 Psittacosaurus 47 Cretaceous Tertiary boundary 47 Palaeozoic era 47 Falcarius 47 T. rex 47 supersolid 47 Homo species 47 fungus Batrachochytrium dendrobatidis 47 isostatic rebound 47 exo planets 47 Zeebe 47 Late Cretaceous 47 Iapetus 47 Repenomamus 47 Masao Ninomiya 47 Plate tectonics 47 deformed frogs 47 Stegodon 47 Voynich Manuscript 47 stromatolites 47 moonlet 47 evolutionary origins 47 necked dinosaurs 47 saber tooth cats 47 celled organisms 47 GJ#b 47 plesiosaur 47 arthropods 47 Neoproterozoic 47 mantle plumes 47 sunspots 47 faunas 47 Early Cretaceous 47 magnetic reconnection 47 Late Cretaceous Period 47 clathrates 47 planet Uranus 47 astrobiologists 47 Riemann hypothesis 47 Neoproterozoic era 47 neonicotinoid pesticides 47 Venus transits 47 Pääbo 47 Sumatran earthquake 47 vesper bats 47 placental mammal 47 Cyanobacteria 47 terrestrial mammals 47 Homo ergaster 47 interstellar dust clouds 47 Little Ice Age 47 comets asteroids 47 magma ocean 47 solar nebula 47 neutron stars 47 golden toad 47 nematode worm 47 Albertosaurus 47 Hominids 47 Neanderthals interbred 47 Indohyus 47 Martian dust 47 Miocene epoch 47 hominid 47 fossilized creatures 47 Neutron stars 47 tectonic plate movements 47 asteroids orbiting 47 Mayan calendar ends 47 Brownian motion 47 Precambrian 47 Schrödinger cat 47 vertebrates 47 microevolution 47 Deccan Traps 47 galactic cannibalism 47 coevolution 47 bacterial symbiont 47 fruitflies 47 chytridiomycosis 47 YORP effect 47 theropod 47 Fomalhaut b 47 kyr 47 SN#A 47 bilaterally symmetrical 47 undersea volcanoes 47 Moya Sola 47 antimatter particles 47 Neanderthal fossils 47 Kaluza Klein 47 Volcanic eruptions 47 wavefunction 47 thermonuclear reactions 47 S. sanguinis 47 glaciers receded 47 contagious yawning 47 Svedhem 47 atmospheric CO 47 comb jelly 47 planetoid 47 Tawa hallae 47 Kuiper belt 47 Ediacaran Period 47 horned dinosaurs 47 baryonic 47 Hominid 47 mega fauna 47 pterosaurs 47 methanogenesis 47 PSR B# +# 47 glacial earthquakes 47 Jurassic era 47 paleoanthropologists 47 tetrapods evolved 47 Jurassic Period 47 Marc van Roosmalen 47 infall 47 noctilucent clouds 47 Nosema 47 evolutionary lineages 47 proto planetary disk 47 noncoding RNAs 47 crinoid 47 palaeontologists 47 planets orbiting distant 47 crocodiles turtles 47 tetrapod 47 journal Icarus 46 thermophilum 46 red supergiants 46 superfluids 46 SN #E 46 NASA Wilkinson Microwave 46 galaxy clusters 46 plankton blooms 46 amphibian extinctions 46 Tarbosaurus 46 supernova remnants 46 atmospheric circulation 46 angiosperm 46 forams 46 species extinctions 46 genus Homo 46 monotremes 46 von Frese 46 superstorms 46 Doppler shifts 46 ancient supercontinent 46 mya 46 southern supercontinent 46 axions 46 planetary alignments 46 observable universe 46 sunlike stars 46 Fritz Zwicky 46 cattle mutilations 46 coprolites 46 stegosaur 46 single celled bacteria 46 prehistoric mammals 46 overhunting 46 Tertiary Period 46 Kuiper Belt Object 46 collisional 46 BP Piscium 46 moon Mab 46 filamentary structures 46 Laetoli Tanzania 46 warm interglacial 46 brachiopods 46 Martian gullies 46 carbon cenospheres 46 asexual reproduction 46 Makovicky 46 Ecology Letters 46 hominid skeleton 46 supermoons 46 chytrid fungus 46 sedimentary layers 46 energetic cosmic rays 46 Mesozoic mammals 46 sunspot cycle 46 Periodical Cicadas 46 Xing Xu 46 irreducibly complex 46 ejecta 46 meteor 46 journal Astrobiology 46 interstellar cloud 46 ULIRGs 46 Upsilon Andromedae b 46 terrestrial mammal 46 planet WASP #b 46 astrophysicists 46 gluon 46 vertebrate fossils 46 Anchiornis huxleyi 46 supernovae 46 Cretaceous periods 46 protozoans 46 Eocene Epoch 46 nuclides 46 paleontologists 46 sterile neutrinos 46 Acanthostega 46 D. radiodurans 46 Sasselov 46 lunar perigee 46 galactic clusters 46 constellation Coma Berenices 46 Comet Halley 46 erectus 46 periodic oscillations 46 diporeia 46 megadrought 46 speciation 46 X ray binaries 46 Neanderthals Homo neanderthalensis 46 Scientists theorized 46 Fred Hoyle 46 bee populations 46 fossilized dinosaur dung 46 Georges Cuvier 46 Oort Cloud 46 Miocene Epoch 46 punctuated equilibrium 46 Iguanodon 46 sauropod 46 hominids 46 Laurasia 46 methanogens 46 Saturn moon Mimas 46 electrons behave 46 blazar 46 GQ Lupi 46 titanosaurs 46 magnetic monopole 46 Tianyulong 46 globulars 46 Mojzsis 46 branching corals 46 H. heidelbergensis 46 Carboniferous Period 46 climate modelers 46 comet Shoemaker Levy 46 #gy 46 Keeling Curve 46 Martian crater 46 Einstein relativity 46 classical CJD 46 Geminids 46 Halley comet 46 glacial melting 46 Dr. Casadevall 46 Mojoceratops 46 Mapusaurus roseae 46 Falcarius utahensis 46 astronomers 46 gall wasps 46 starquakes 46 Dinosauria 46 Higgs singlet 46 COROT 7b 46 lunglessness 46 known bird Archaeopteryx 46 retrograde orbits 46 bacterium Francisella tularensis 46 journal Meteoritics 46 Saturn auroras 46 planetary nebulae 46 thermonuclear explosion 46 phylogeny 46 planets astronomers 46 phenotypic differences 46 Tunguska 46 Epileptic seizures 46 Haumea 46 Nazca lines 46 Comet Shoemaker Levy 46 phytoplasma 46 frogs salamanders 46 insects crustaceans 46 Neogene 46 lichens 46 Omega Centauri 46 dwarf spheroidal galaxies 46 glacial geology 46 comet dust 46 supercomputer simulations 46 mammoths mastodons 46 oxygen isotopes 46 Uberabasuchus 46 primitive meteorites 46 flowering plants 46 taxonomic classification 46 epigenetic changes 46 Martian microbes 46 Chinese mitten crab 46 fossils dating 46 Solar flares 46 sympatric speciation 46 Coelophysis 46 PSR J# +# 46 chondrules 46 dwarf galaxy 46 PETM 46 nebular 46 eating sauropod dinosaurs 46 abiogenic 46 Dikpati 46 Christophe Lovis 46 HAR1 46 Mayan calendar 46 planetesimals 46 homo floresiensis 46 Sahelanthropus tchadensis 46 Oliver Rauhut 46 Earthlike planet 46 fossilized skull 46 SN #C 46 sub glacial lakes 46 Hispaniolan solenodon 46 unicellular 46 Homo heidelbergensis 46 CRISPR Cas 46 Piltdown Man 46 lineages diverged 46 evolutionary theorists 46 mangabeys 46 Tarduno 46 Nicholas Longrich 46 spicules 46 Cenozoic era 46 Gondwana supercontinent 46 dimming starlight 46 gravitational waves 46 Late Devonian 46 merging galaxies 46 supercolony 46 Supernova #A 45 olivine mineral 45 X ray emission 45 megalodon 45 comet nuclei 45 zircons 45 ScienceNOW 45 paleoclimatology 45 astronomer Johannes Kepler 45 neutron star 45 sonofusion 45 GRB #B 45 sediments deposited 45 deglaciation 45 colliders 45 Maria Karayiorgou 45 assassin spiders 45 eukaryotes 45 blackholes 45 Kittlitz murrelet 45 Molecular Ecology 45 galaxy formation 45 Sauropod 45 Chandra Wickramasinghe 45 Lynn Margulis 45 segmental duplications 45 distant quasar 45 carbonate minerals 45 Zhe Xi Luo 45 beak deformities 45 Osedax 45 vortices 45 Big Bang cosmology 45 planets orbits 45 Raptorex kriegsteini 45 extragalactic 45 amyloid cascade 45 Phytophthora species 45 Shuhai Xiao 45 neutrino oscillation 45 Wolf Rayet star 45 Norris Geyser Basin 45 Panderichthys 45 Hawking radiation 45 single celled algae 45 cometary 45 Dauphas 45 Homo erectus evolved 45 Ventastega 45 robustus 45 tardigrades 45 faraway galaxies 45 Lower Paleolithic 45 megaflood 45 Kounaves 45 CoRoT 9b 45 axial tilt 45 pentaquark 45 Mark Changizi 45 Hale Bopp 45 glacial retreat 45 Zhao Xijin 45 OGLE TR #b 45 evolutionists 45 Shoemaker Levy 45 Tharsis Rise 45 spherules 45 SN #cr 45 anthropic principle 45 melting permafrost 45 vertebrate 45 inbreeding depression 45 Gerard Kuiper 45 aurorae 45 Quaoar 45 super Earths 45 Pleistocene Ice Age 45 Sahelanthropus 45 Fossilised 45 mitochondrial DNA lineages 45 hawk moth 45 carbon isotopes 45 Cassini Regio 45 anthropogenic CO2 emissions 45 Cygnus X 45 starburst galaxy 45 transiting planets 45 Quadrantids 45 wave particle duality 45 interstellar dust grains 45 fossilized pollen 45 subatomic particles 45 called lobate scarps 45 gaseous planet 45 transiting exoplanet 45 theropods 45 stratospheric aerosols 45 mammalian evolution 45 molecular phylogenetic 45 chondritic 45 mineral olivine 45 cnidarians 45 atmospheric phenomena 45 HIP #b 45 megalodon shark 45 Gigantoraptor 45 SN Ia 45 nebula