Related by context. Frequent words. (Click for all words.) 60 marine invertebrates 57 melanosomes 56 oxygen isotopes 56 abundances 56 foraminifera 56 zooplankton 55 tetrapod 55 gobies 54 crocodilians 54 isotopic composition 53 morphology 53 nacre 53 pectoral fins 53 morphologies 52 tetrapods 52 diatoms 52 Tiktaalik 52 prokaryotes 52 morphologically 52 anatomical structures 52 morphologic 52 morphological 52 terrestrial ecosystems 51 vertebrate 51 thermocline 51 marine sediments 51 baleen whales 51 spherules 51 flatfish 51 collagen fibers 51 photoreceptors 51 anisotropy 51 theropod 51 mammalian brain 50 microfossils 50 sensory organs 50 olfactory bulb 50 photoreceptor 50 diatom 50 zircons 50 sticklebacks 50 tadpole 50 aquatic insects 50 cochlea 50 cilia 50 temperature salinity 50 coprolites 49 iridescence 49 stromatolites 49 corpus callosum 49 subcellular 49 vertebrates 49 Archaeopteryx 49 malformations 49 Late Cretaceous 49 neurones 49 subfamily 49 planktonic 49 trophic 49 sediment cores 49 bony fish 49 yellowish brown 49 sediments 48 nodules 48 ventral 48 stromal 48 larvae 48 isotopic 48 rhodopsin 48 taxa 48 neuronal activity 48 microbiota 48 neural tissue 48 lithosphere 48 aerosol particles 48 copepods 48 neural circuitry 48 gene expression patterns 48 reddish color 48 benthic 48 tadpoles 48 dorsal fins 48 cerebellum 48 amplitudes 48 DNR biologists 48 solar nebula 47 nuclei 47 Ardipithecus 47 vortices 47 LB1 47 narwhal 47 Neandertal 47 pterosaur 47 trilobites 47 filter feeders 47 corals 47 FGF# 47 multicellular 47 striations 47 hydrothermal vent 47 theropods