Related by context. Frequent words. (Click for all words.) 60 Rignot 57 Poinar 57 Paabo 55 Hurum 55 Sinervo 54 Cerling 53 Svante Paabo 53 Siberian permafrost 53 Beringia 53 Palumbi 53 Otzi 53 sediment cores 53 Longrich 52 microfossils 52 palaeontology 52 primate evolution 51 Niels Bohr Institute 51 Oetzi 51 O'Dor 51 paleoclimate 50 oxygen isotopes 50 Neandertal 50 coprolites 50 radiocarbon dating 50 Radiocarbon dating 50 marine sediments 49 Palaeontologists 49 Calambokidis 49 foraminifera 49 Serreze 49 isotope ratios 49 paleoanthropologist 49 interglacial period 49 mitochondrial genome 49 developmental biologist 49 Neandertals 49 thylacine 48 Lunine 48 Felisa Wolfe Simon 48 Scambos 48 megafauna 48 Nicolelis 48 radiocarbon 48 scientists 48 radiocarbon dated 47 Amstrup 47 palaeontologists 47 Snowball Earth 47 paleontological 47 Morwood 47 fossils 47 Umeå University 47 Indohyus 46 otoliths 46 Wrangham 46 atmospheric methane 46 Denisovans 46 Worobey 46 Columbian mammoth 46 zircons 46 glaciations 46 Hakonarson 46 woolly mammoths 46 permafrost 46 Lake Vostok 46 diatoms 46 wooly mammoth 46 fossil specimens 46 Ken Caldeira 45 researchers 45 Neanderthals 45 skull fragment 45 Ardipithecus ramidus 45 Chilingarov 45 elemental composition 45 anatomically modern 45 vom Saal 45 tetrapod 45 geomorphology 45 Palaeontology 45 palaeontologist 45 deglaciation 45 Trinkaus 45 prehistory 45 Chiappe 45 tissue samples 44 specimens 44 horned dinosaur 44 Greenland ice 44 interglacial 44 Dry Valleys 44 equatorial regions 44 Robock 44 marine reptile 44 marine invertebrates 44 diatom 44 H. erectus 44 lunar soil 44 anthropoids 44 isotopic composition 44 Mark Serreze