Related by context. Frequent words. (Click for all words.) 60 sexual dimorphism 59 vertebrates 59 crocodilians 58 placental mammals 58 tetrapod 57 carnivorous dinosaurs 57 mammals 56 H. erectus 56 vertebrate 56 feathered dinosaurs 55 Diplodocus 55 theropod 55 tyrannosaurs 54 tetrapods 54 Indohyus 54 tyrannosaur 54 prokaryotes 54 forelimbs 54 hominin 54 Australopithecus 54 crocodilian 53 Ardipithecus 53 Apatosaurus 53 unicellular 53 phyla 53 arthropods 53 toothed whales 53 multicellular organisms 53 mammalian species 52 dinosaurs 52 Tiktaalik 52 platypuses 52 primate evolution 52 fossilization 52 hadrosaur 52 bipedalism 52 angiosperms 52 multicellular 52 hominins 52 anthropoids 52 pterosaur 52 vertebrate animals 52 velociraptors 52 convergent evolution 52 primate species 52 mammal 52 morphologies 51 trilobites 51 humans 51 evolutionary 51 marine invertebrates 51 sauropods 51 Neandertals 51 African savanna 51 theropods 51 mammalian brain 51 sea anemones 51 hind limbs 51 morphologically 50 Homo sapiens 50 planktonic 50 ammonites 50 Brachiosaurus 50 mammalian 50 asexual reproduction 50 pectoral fins 50 Archaeopteryx 50 herbivores 50 Longrich 50 species 50 lizards 50 pterosaurs 50 faunal 50 terrestrial ecosystems 49 T. rex 49 sauropod 49 mantis shrimp 49 carnivorous dinosaur 49 herbivorous 49 evolutionary adaptation 49 homo sapiens 49 morphological 49 herbivore 49 ground sloths 49 flightless birds 49 forelimb 49 dragonflies 48 vertebrate species 48 taxa 48 mottled brown 48 arthropod 48 baleen whales 48 subfamily 48 spiny 48 otoliths 48 temperate forests 48 apex predators 48 marine reptiles 48 genus Homo 48 avian species 48 eukaryotes