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(Click for frequent words.) 58 Lapen 57 Bottke 54 meteorites 54 Machholz 53 meteorite 53 Korotev 52 Grotzinger 52 Zolensky 52 Kuchner 52 meteorite hunters 52 Earthly contamination 51 Planetary Studies 51 Meteorites 50 Gutoski 50 Bindschadler 49 Squyers 49 Bramley Murton 49 fossilized dung 49 paleontology curator 49 Storrie Lombardi 48 Tosaw 48 Divoky 48 A'Hearn 48 Remijan 48 comets meteors 48 Mutel 48 Narlock 48 Larry Soderblom 48 pallasite meteorite 48 Jurasevich 48 Kasting 48 Kargel 47 Jedicke 47 Don Gurnett 47 Wolszczan 47 Vakoch 47 Poinar 47 Mojzsis 47 von Frese 47 Kucharik 47 meteorite fragments 47 Nastrom 47 Meteorite 47 Hörst 47 Lunine 47 martian rocks 47 Alsheimer 46 Lentfer 46 meteor 46 Stimpfle 46 Moersch 46 Anthony Remijan 46 carbonaceous chondrites 46 comets asteroids 46 Overbye 46 Jakosky 46 spherules 46 William Bottke 46 Melosh 46 Shetlar 46 Gene Kritsky 46 Sockman 46 Cosmic ray 46 Aldenderfer 45 astrobiologists 45 Cassini interdisciplinary 45 Lovis 45 sterile neutrino 45 freshwater jellyfish 45 Gehrels 45 Cusey 45 meteoroid impacts 45 Pellitteri 45 Waldbauer 45 planetary scientist 45 Earthlike planets 45 Sibeck 45 Bemko 45 Brigham Grette 45 planetary geology 45 Shepson 45 Bonadurer 45 Kreilkamp 45 Sara Seager 45 Kounaves 45 Freidhof 45 cometary dust 45 geodes 45 gray hematite 45 Mladenik 45 mineralogist 45 Jenniskens 45 Stawara 44 Comet Hartley 44 astrobiological 44 rockhound 44 Heasler 44 Oort Cloud 44 Steinbring 44 Bedout 44 meteorite hunter 44 Halley comet 44 meteor fragment 44 icy comets 44 vertebrate paleontologist 44 concretions 44 Saturn Cassini 44 Roetker 44 Bergstad 44 interstellar cloud 44 Zarnecki 44 lunar meteorites 44 Haugerud 44 Paragamian 44 Schleder 44 Visocky 44 Martian meteorite 44 Notkin 44 Gamma ray burst 44 Wargowsky 44 Jamie Elsila 44 Gaidos 44 Ice Age mammals 44 Saturn Enceladus 44 Bidle 44 Leshin 44 meteorite craters 44 Kramper 44 Jay Melosh 44 Spudis 44 Bruseth 43 constellation Carina 43 Spiro Mounds 43 Sushil Atreya 43 Nicholas Conard 43 habitable planets 43 Smrekar 43 Mosbaugh 43 Wollney 43 Baross 43 exo planets 43 Phaff 43 Dennis Van Gerven 43 extrasolar worlds 43 Caltech astronomer 43 comet McNaught 43 Petrified wood 43 Dupke 43 planetary astronomer 43 phyllosilicates 43 Rollag 43 LaGesse 43 Mars Squyres 43 Martian craters 43 Martian crater 43 Bandfield 43 KT boundary 43 Epsilon Eridani 43 Aufdenberg 43 sulfate minerals 43 Stingle 43 highly elliptical orbits 43 Dunehoo 43 Keehr 43 dino bones 43 Prudic 43 Paneak 43 Hlusko 43 Avishay Gal Yam 43 carbonaceous chondrite 43 lunar crust 43 Fleek 43 Biek 43 Gaensler 43 cometary 43 olivine mineral 43 Jill Pruetz 43 Vondrak 43 Michael Studinger 43 planetary atmospheres 43 Cambrian Period 43 McKay planetary scientist 42 Martian rocks 42 hematite mineral 42 paleoecologist 42 Oliver Pergams 42 Fearnbach 42 Meridiani 42 lunar meteorite 42 Donston 42 Patricia Zaradic 42 Amateur astronomers 42 Saturn moons 42 Krutke 42 Hochella 42 Foing 42 Rensink 42 Carey Lisse 42 Comet LINEAR 42 Phernetton 42 Bernatowicz 42 Mandushev 42 Lenfestey 42 meteoroid 42 Slimak 42 Eberth 42 Herberholz 42 constellations planets 42 hydrothermal explosions 42 Parcak 42 Tetter 42 Samuel Oschin Telescope 42 Grillmair 42 Hofreiter 42 Gerard Kuiper 42 Winistorfer 42 Fashingbauer 42 Muetzel 42 Martian terrain 42 dirty snowballs 42 Martian microbes 42 Perseid meteor showers 42 Brusatte 42 Patricia Tombaugh 42 mammal fossils 42 Becktell 42 carbonate minerals 42 asteroid 42 Sasselov 42 asteroid Eros 42 Knoell 42 Taurid 42 Pekoc 42 Ziehr 42 Thares 42 Deep Impact flyby spacecraft 42 Gamburtsev 42 Stardust comet 42 Ebnet 42 Elkinton 42 Weigum 42 Gregory Asner 42 COROT 7b 41 Hestekin 41 Ziurys 41 absorbs photons 41 Smithsonian astronomer 41 Pernicka 41 Banerdt 41 Witsell 41 constellation Eridanus 41 infalling 41 interstellar dust particles 41 Kumlien 41 Rosenak 41 lunar soil 41 Schuerger 41 Jonathan Lunine 41 stony meteorites 41 Geisz 41 ejecta 41 Muons 41 Regel 41 martian meteorites 41 Bryan Gaensler 41 Saturnian 41 Scheiderer 41 extrasolar 41 conclusions NASA Astrobiology 41 glacial geology 41 Lake Cheko 41 Iseminger 41 Neises 41 Houtkooper 41 NASA astrobiology 41 interplanetary dust 41 Astrophysics Cambridge Mass. 41 moons circling 41 Cabrol 41 Bond Lamberty 41 planets comets 41 Tunguska meteorite 41 Rabosky 41 Oschwald 41 Frederic Pont 41 Charon Pluto 41 Robert Vrijenhoek 41 Zelenitsky 41 Nina Jablonski 41 comet 41 Earthlike planet 41 interstellar particles 41 Ellen Stofan 41 plaster replicas 41 meteor impacts 41 permanently shadowed craters 41 icy moons 41 Greimann 41 Ontario Lacus 41 Meteor Crater 41 Astrobiologists 41 RQ# 41 Planck 41 Strycker 41 Stardust capsule 41 Martian meteorites 41 Russell Ciochon 41 Comet Hartley 2 41 Gaedcke 41 Frebel 41 comet dust 41 Antarctic Dry Valleys 41 vertebrate paleontology 41 Tesky 41 Tullis Onstott 41 Megeath 41 NASA Cassini 41 Kueter 41 polygon patterns 41 protoplanet 41 Grusing 41 Willerslev 41 Thiemens 41 Pransky 41 Cryogenian period 41 Cometary 41 Kardel 41 GJ #b [002] 41 meteoroids 41 Pellant 41 bolide 41 binary asteroids 41 Kuiper Belt Objects 41 Priscu 41 meteor fireball 41 Nicholas Bellantoni 41 planemos 41 Henize #-# 41 Srader 41 asteroids 41 Kruckeberg 41 Gondolo 41 Buzzard Coulee 40 Nippoldt 40 Galactic cosmic rays 40 Kitsmiller 40 Comet Halley 40 planet HD #b 40 asteroid collisions 40 Meteoritical Society 40 Howk 40 meteor streaking 40 extraterrestrial civilizations 40 evaporite deposits 40 tektites 40 Johannes Lehmann 40 exoplanetary 40 Orwoll 40 Neukum 40 Voyager spacecraft 40 Sitze 40 Vieths 40 Galilean satellites 40 Davidovits 40 Gyles Randall 40 mastodon tusk 40 astronomical objects 40 Kappauf 40 airbursts 40 iron meteorite 40 Hezlep 40 Aurigid 40 Schwindenhammer 40 Earth asteroids NEAs 40 thunderbirds 40 Klanderman 40 Zygarlicke 40 Planetary Science Institute 40 Peter Makovicky 40 Luetzen 40 Grivetti 40 sedimentary rock 40 Terra Meridiani 40 Hofstrand 40 Spergel 40 Tlougan 40 Rickart 40 Mount Stromlo Observatory 40 stony meteorite 40 Laidre 40 astronomical phenomena 40 Eastberg 40 Pfann 40 Earth 40 Corot 7b 40 spectroscopic analysis 40 ordinary chondrite 40 Robert Jedicke 40 zircon crystals 40 Heinerth 40 retrograde orbit 40 Comet NEAT 40 spacecraft flyby 40 Bohart Museum 40 moons orbiting 40 accretion disks 40 planetoids 40 mastodon bones 40 Cundieff 40 Neusch 40 prehistoric fossils 40 Lanzendorf 40 Dolechek 40 paleontological dig 40 NEAs 40 spaceweather.com 40 Planetary scientist 40 interstellar dust tiny 40 Gidon Eshel 40 Watsabaugh 40 Nikku Madhusudhan 40 Meteorite hunters 40 zircon crystal 40 Mary Voytek 40 martian surface 40 Fogue 40 Stansbery 40 moonlets 40 planet Nibiru 40 Richard Mushotzky 40 Kuiper belt objects 40 Nealson 40 Heckenberger 40 Mikucki 40 Dieterman 40 Kowalczk 40 protons collide 40 cumulus cloud 40 Rezny 40 Rauhut 40 burrowing mammals 40 Welshons 40 paleoclimatology 40 gamma ray flashes 40 Schroers 40 vertebrate zoology 40 presolar grains 40 Skalicky 40 Zalasiewicz 40 Wicklander 40 planets asteroids 40 protoplanetary disks 40 Youngquist 40 Renkin 40 Prockter 40 lunar equator 40 Ollenburger 40 Noah Fierer 40 tholins 40 sauropod skulls 40 Saturnian moon Titan 40 Fiebich 40 Curfs 40 mastodon tooth 40 Zirnheld 40 Yanoviak 40 interstellar dust grains 40 Nilton Renno 40 Ortland 40 Klyberg 40 inch refracting telescope 40 RRATs 40 planets astronomers 40 panspermia 40 Woelffer 40 silicate dust 40 Waythomas 40 Hujik 40 geochemist 40 Baltus 39 Damery 39 planetary surfaces 39 stromatolite 39 Wick Haxton 39 Prairie Meteorite 39 Weihert 39 Nasa spacecraft 39 Meteoritics 39 microbialites 39 pinpoints Lopez Alegria 39 Soelzer 39 Droser 39 Lednicky 39 Gravitational waves 39 Longtine 39 Mercury magnetosphere 39 Ordovician extinction 39 Geminids meteor shower 39 Jeffrey Kargel 39 Astronomically speaking 39 geochronology 39 astrobiology 39 Honebrink 39 noctilucent clouds 39 rockhounds 39 called lobate scarps 39 Bonneville Crater 39 Syrtis Major 39 Michael Zolensky 39 Boekelheide 39 polar craters 39 inhabitable planets 39 CU Boulder geological 39 comets 39 Astrophysicists 39 Upsilon Andromedae b 39 Houlberg 39 Bill Borucki Kepler 39 Holmquist Wahl 39 Einstein theories 39 pallasite 39 planetary nebulae 39 galaxy M# [001] 39 mineral hematite 39 neutralinos 39 Gliese #c 39 hydrated minerals 39 asteroids comets 39 Mary Smeins 39 Spandorfer 39 Quadrantid meteor shower 39 planets moons 39 dimming starlight 39 Rulifson 39 Dohrer 39 Drake Deming 39 Earthlike 39 Saturn moon 39 Leckron 39 Vorland 39 extraterrestrial civilization 39 Komossa 39 Pociask 39 CoRoT satellite 39 Svingen 39 Holth 39 Ankenbauer 39 ammonite 39 Poetz 39 Traud 39 amateur skywatchers 39 fossilized shells 39 Koshiol 39 cometary debris 39 pebble sized 39 astrophysical phenomena 39 gamma ray observatory 39 Leskey 39 Diana Dretske 39 Ratté 39 Astrophysical Institute 39 Estrada Belli 39 rune stones 39 smoothest flattest spot 39 emit X rays 39 vertebrate palaeontology 39 geysers erupting 39 Goldilocks planet 39 Kubly 39 Astrophysical 39 Verosub 39 Murchison meteorite 39 Hipparchus 39 Benedix 39 Daeschler 39 Cretaceous Paleogene boundary 39 Gaussoin 39 multicellular species 39 Haasl 39 comets orbiting 39 sunlike stars 39 Pavloski 39 silicon monoxide 39 P/# A2 39 comet nucleus 39 biosignatures 39 Heffernon 39 Verhille 39 binary asteroid 39 Parizek 39 Submillimeter Array 39 Christian Krupke 39 sedimentary layers 39 paleontology 39 exosolar planets 39 Comroe 39 perchlorate salts 39 Kensington Runestone 39 Zivie 39 Joe Veverka 39 merging galaxies 39 comet Wild 39 planets atmospheres 39 planets orbiting sun 39 chondritic meteorites 39 frog spawn 39 Feigelman 39 Beratan 39 Overholtzer 39 Holen 39 Kaphingst 39 AB Aurigae 39 Buhs 39 interstellar medium 39 Jupiter moon Io 39 Lovich 39 Fryxell 39 Hoelmer 39 interstellar space 39 meteors 39 Hofsess 39 Mark Westneat 39 Tucke 39 Cornatzer 39 Hamish Pritchard 39 planet Gliese #g 39 cosmological theories 39 extraterrestrial microbes 39 novas 39 fossil vertebrates 39 astronomy 39 lunar regolith 39 Betthauser 39 Quadrantids 39 terrestrial mammals 39 comet Hale Bopp 39 floating orbs 39 Oort cloud 39 INSTAAR 39 moon Mimas 39 Konacki 39 Lootens 39 ultraviolet spectrometer 39 Fantastic Caverns 39 prebiotic molecules 39 reentry capsule 39 Malepsy 39 mammalogist 39 Gusev crater 39 circumstellar 39 cosmic microwave background 39 Martian rovers 39 Super Earths 38 astronomer 38 Grevlos 38 Baltensperger 38 protoplanets 38 WASP #b 38 Handschke 38 beetles moths 38 van der Pluijm 38 hydrothermal vent 38 Lawrence Krauss 38 intrinsic brightness 38 Jaquays 38 sea hydrothermal vents 38 Larry Agenbroad 38 Hirleman 38 Lindsay Zanno 38 Prechtel 38 Reyerson 38 horned larks 38 Zihlman 38 Thomas Keprta 38 Kuiper Belt objects 38 Dulik 38 Meshke 38 Tarduno 38 Chicxulub asteroid 38 Pitzl 38 Glaciologist 38 Frybarger 38 AMNH 38 Fosha 38 Roskin 38 Joeckel 38 foraminifera 38 silicates 38 Jeffrey Plaut 38 Baloun 38 APXS 38 Pieter van Dokkum 38 Optical Gravitational Lensing Experiment 38 rocks 38 Kummrow 38 Mammoth Site 38 chondritic 38 Comet Machholz 38 Dinosaur Cove 38 Toutatis 38 Doede 38 alien civilizations 38 dryosaurus 38 Waldher 38 Upsilon Andromedae 38 Caughran 38 Tharsis Rise 38 geomicrobiology 38 Estock 38 Redel 38 meteorite impacts 38 Marmarth Research 38 Grossarth 38 Lubkeman 38 Alt livia 38 geochemists 38 Debiec 38 Mars 38 Sonia Lupien 38 Liebhold 38 sedimentary deposits 38 cometary particles 38 volcanic basalt 38 volcanic lava flows 38 solar nebula 38 igneous rocks 38 Zeveloff 38 Tunguska Siberia 38 Battreall 38 biogeochemist 38 Mulkins 38 asteroids orbiting 38 Sederberg 38 B. Brumbaugh 38 Scripsick 38 extragalactic 38 Werren 38 supersymmetric particles 38 sundog 38 Fadely 38 superheavy elements 38 Quadrantid 38 Jurassic Period 38 Goik 38 Huettel 38 roseum 38 protoplanetary 38 Reineking 38 Tabashnik 38 Vrijenhoek 38 Hartweg 38 Seramur 38 Paleontologist 38 microscopic specks 38 Rabeling 38 circumstellar disks 38 Carl Pilcher 38 Roozeboom 38 Hammerling 38 Nohner 38 Muraca 38 Taurid meteor shower 38 microbial ecologist 38 Gliese #G 38 planetary geologists 38 Bertalotto 38 Greseth 38 Hruza 38 albedo reflectivity 38 Rainera 38 Pittendrigh 38 Fiduccia 38 Nickisch 38 Heinly 38 Heinselman 38 graphite whiskers 38 Giorgio Gruppioni 38 Earth asteroids 38 chemtrails 38 planetary science 38 NASA Astrobiology Institute 38 Dust devils 38 Kurt Retherford 38 dust mote 38 Keck Telescope 38 Macovich Collection 38 Manned missions 38 Titan Saturn 38 Wikert 38 Mirandette 38 astrophysicists 38 Ring Nebula 38 Meteor showers 38 radioactive nuclei 38 fossils 38 Planetary nebulae 38 Chichak 38 GJ#b 38 Fains 38 Stailey 38 Mullineaux 38 astrobiologist 38 Comet Hale Bopp 38 Bolduan 38 Magnetars 38 chondrules 38 Joel Primack 38 Nasa Kepler 38 interstellar dust clouds 38 Grosman 38 Extrasolar 38 Butzen 38 Slotin 38 Werline 38 Olgers store 38 Checkett 38 Henshilwood 38 Di Achille 38 horny toads 38 tardigrades 38 Martian dust 38 Fendorf 38 Resau 38 Behounek 38 Linnenbrink 38 Ruesink 38 particle astrophysics 38 Richard Lenski 38 NCEAS 38 Frenzen 38 Dauphas 38 Heezen 38 Bidlingmaier 38 Oremland 38 Gelsleichter 38 Slisher 38 Fellion 38 rock outcrop 38 Astrobiology Institute 38 gravitational microlensing 38 dinosaur skeletons 38 landforms 38 Blatti 38 Woellhof 38 Ruby throated hummingbirds 38 Arbesman 38 Noctilucent clouds 38 Udermann 38 Dopler 38 Jo Handelsman 38 KBOs 38 Siebrasse 38 Weart 38 Ohmoto 38 Thure Cerling 38 Tesner 38 inner asteroid belt 38 DiLulio 38 golfball size 38 phyllosilicate 38 Mlot 38 comets moons 38 southern supercontinent 38 Sallan 38 Raih 38 Messoline 38 Klagge 38 Cruson 38 quark gluon 38 Bryja 38 Moravitz 38 Galaxy Evolution 38 tiny meteoroids 38 coprolite 38 Titchenell 38 Christophe Lovis 38 Wraithmell 38 subatomic particle 38 crinoid 38 Negen 38 Stephane Udry 38 Gliese #d 38 Iguanodon 38 Pleiades cluster 38 Uek 38 crunching underfoot 38 Pan STARRS PS1 telescope 38 Oehrlein 38 Wiant 38 stellar nurseries 38 magnetic monopoles 38 extraterrestial 38 Flechtner 38 Sondrol 38 Chicxulub 38 Winston Seiler 38 Saturn rings 38 Dyjak 38 ostracods 38 radiometric dating 38 retrograde orbits 38 crinoids 38 comet Tempel Tuttle 38 Brother Guy Consolmagno 38 cryovolcanism 38 Emily Lakdawalla 38 Uwe Bergmann 38 Arkansas Archeological Survey 38 DiBerardino 38 telescopic observations 37 paleoanthropologist 37 VandenBoom 37 Jurgemeyer 37 Geisert 37 asteroidal 37 trilobites 37 dust motes 37 planetary orbits 37 Dykshoorn 37 lobate scarps 37 komatiites 37 Toeller 37 collisional 37 Chicxulub crater 37 Kepler #b 37 Steneck 37 Rainer Klement 37 Fossilized bones 37 Beschta 37 Wothe 37 MMT Observatory 37 Napoliello 37 Strykowski 37 Burgess Shale 37 exo planet 37 strangelets 37 Thostenson 37 Olbrantz 37 Martian surface 37 fossilized dinosaur dung 37 VanZant 37 Scholin 37 cosmic microwave radiation 37 Mancke 37 Dilgard 37 Treasure hunters 37 CMB radiation 37 microquasar 37 Bousum 37 superfluids 37 Gawboy 37 nucleosynthesis 37 matter antimatter asymmetry 37 Tawzer 37 Venusian atmosphere 37 aurorae 37 Avi Loeb 37 Torrison 37 Gontz 37 Canant 37 TW Hydrae 37 Van Mooy 37 flint arrowheads 37 Dutton geophysicist 37 Carroccio 37 Latterell 37 Wolfersberger 37 magnetars 37 planets 37 self replicating nanobots 37 Jasiak 37 melt inclusions 37 Moomey 37 Precambrian 37 Slaback 37 Prilliman 37 Zubrick 37 Nazca lines 37 Richerson 37 Swift Tuttle 37 Houglum 37 Feranec 37 Zoran Milicevic deputy 37 Stommel 37 Boisserie 37 Schoper 37 meteor craters 37 dinosaur Sereno 37 Virts 37 Gerarden 37 Periodical Cicadas 37 mammoth tusks 37 geoglyphs 37 Pesola 37 mammalogy 37 planetesimal 37 Schoenfuss 37 Kostelnick 37 fireball streaking