Related by context. Frequent words. (Click for all words.) 54 biogeochemical 51 trilobite 51 systematics 50 hydrothermal vent 49 foraminifera 49 Supplementary Fig 48 relict 48 planktonic 48 insects spiders 48 brachiopods 47 mosasaurs 47 isotope ratios 47 bianco 46 diatom 46 marine invertebrates 46 morphologically 45 protists 45 amphipods 44 aragonite 44 trilobites 44 Earthlike 44 unicellular 44 prokaryotes 44 oxygen isotope 44 coevolution 44 Vinther 44 chondrules 44 chytrid 44 noble gases 44 extinct volcanoes 43 isotopic composition 43 elemental composition 43 manganese oxide 43 photosynthetic organisms 43 deglaciation 43 plesiosaurs 43 MgO 43 diatoms 43 Moho 43 microfossils 43 single celled 43 abundances 43 mud volcanoes 43 fossilize 42 braincase 42 methane ethane 42 marine sediments 42 morphologies 42 microbial ecology 42 proline 42 snail shells 42 Tiktaalik 42 placental mammals 42 methanogens 42 Eemian 42 photosynthetic bacteria 42 biogenic 42 Seafloor 42 abiotic 42 biogeochemistry 42 spectral signatures 42 formate 42 Indohyus 42 morphology 42 reactive nitrogen 42 Neoproterozoic 42 terrestrial ecosystems 42 Firmicutes 42 meteor impacts 41 Martian meteorites 41 otoliths 41 volcanic vents 41 interglacial period 41 marine reptiles 41 planetary nebula 41 ALH# 41 stromatolites 41 isoprene 41 isotopic 41 temperature gradients 41 clathrates 41 biota 41 Lowenstern 41 Schladow 41 hydrothermal activity 41 aquatic invertebrates 41 chondrites 41 tobiko 40 tetrapod 40 erupting volcanoes 40 lifeforms 40 basaltic 40 exosphere 40 Neandertal 40 subglacial 40 radiocarbon dated 40 Guldberg 40 Varki 40 oxidise 40 Brusatte 40 flint tools