Related by context. Frequent words. (Click for all words.) 57 feathered dinosaurs 57 aragonite 57 diatom 57 diatoms 56 elemental composition 56 theropod 56 tyrannosaurs 55 marine invertebrates 55 tyrannosaur 55 placental mammals 54 Diplodocus 54 crocodilians 54 toothed whales 54 unicellular 54 baleen whales 54 isotopic composition 53 stromatolites 53 microfossils 53 marine reptile 53 gastropods 53 arthropod 53 foraminifera 53 ammonites 53 mammals 53 trilobites 53 morphologically 53 pliosaur 53 sauropods 53 morphologies 53 Indohyus 53 sexual dimorphism 52 vertebrate animals 52 rotifers 52 Neandertal 52 theropod dinosaurs 52 single celled 52 Raptorex 52 marine reptiles 52 crocodilian 52 abundances 52 convergent evolution 52 prokaryotes 52 molluscs 51 planktonic 51 systematics 51 taxa 51 isotope ratios 51 marine organisms 51 methanogens 51 single celled organisms 51 multicellular organisms 51 tetrapod 51 coelacanth 51 snail shells 51 serrated teeth 50 plesiosaur 50 otoliths 50 oxygen isotopes 50 Caenorhabditis elegans 50 mollusc 50 stickleback 50 pipefish 50 theropods 50 Dry Valleys 50 archaea 50 deglaciation 50 megafauna 50 clathrates 50 Columbian mammoth 50 Apatosaurus 50 tunicates 50 tetrapods 50 marine sediments 50 carnivorous dinosaurs 50 H. erectus 50 forelimbs 49 invertebrates 49 mammal 49 fossil specimens 49 radiocarbon dated 49 cephalopods 49 mantis shrimp 49 beaked whale 49 atmospheric CO 49 biogeochemical 49 spectral signatures 49 coprolites 49 species 49 sauropod 49 sticklebacks 49 LB1 49 Jurassic Period 49 phytoplankton blooms 49 Leatherbacks 49 mammalian species 49 Allosaurus 49 herbivorous 49 multicellular 49 eukaryotic 49 tyrannosaurus 49 apelike