Related by context. Frequent words. (Click for all words.) 65 placental mammals 62 theropod 61 Indohyus 60 multicellular organisms 60 tetrapod 59 Ardipithecus 58 phylogeny 58 phyla 58 morphologically 57 sexual dimorphism 57 feathered dinosaurs 57 hominins 56 Australopithecus 56 H. erectus 56 angiosperms 56 hominin 56 taxa 56 mitochondrial genome 55 morphological 55 tyrannosaur 55 fossilization 55 Late Cretaceous 55 Tiktaalik 55 subfamily 55 multicellular 55 otoliths 55 Ardipithecus ramidus 55 faunal 55 hadrosaur 55 vertebrate animals 55 prokaryotes 55 phylogenetic 55 toothed whales 54 unicellular 54 pterosaur 54 melanogaster 54 Archaeopteryx 54 trilobites 54 asexual reproduction 54 crocodilians 54 taxon 54 evolutionary 54 eukaryotes 54 biogeography 54 eukaryotic 54 evolutionarily 53 phylum 53 theropods 53 Neandertal 53 tyrannosaurs 53 clades 53 mammalian 53 lineages 53 genus 53 diatom 53 tetrapods 53 mammalian species 53 taxonomic 53 hominid 53 wooly mammoth 52 evolutionary adaptation 52 sauropod 52 carnivorous dinosaurs 52 anthropoids 52 vertebrate 52 clade 52 mammal 52 vertebrate species 52 imprinted genes 52 radiocarbon dated 52 Jurassic Period 52 Diplodocus 52 stickleback 52 genus Homo 51 convergent evolution 51 vertebrates 51 Homo sapiens 51 baleen whales 51 mammalian brain 51 Cambrian explosion 51 ammonites 51 bipedalism 51 zebra finch 51 genetically distinct 51 Eadgyth 51 vocalisations 51 mammals 51 palaeontologists 51 morphologies 51 platypuses 51 microfossils 51 Archaea 51 supercontinent 50 species 50 primate species 50 common ancestor 50 giant tortoise 50 arthropod 50 systematics 50 marine invertebrates 50 Homo habilis