Related by context. Frequent words. (Click for all words.) 57 mammal 55 megafauna 55 horned dinosaur 55 Fossilized 55 mammals 55 theropod 54 Neandertals 54 Palaeontologists 54 breeding colony 54 tyrannosaur 54 Indohyus 53 subspecies 53 vertebrate species 53 feathered dinosaurs 53 woolly mammoths 53 temperate forests 53 overhunting 53 Tasmanian tiger 53 amphibian populations 53 pine marten 53 avian species 52 Columbian mammoth 52 clouded leopards 52 carnivorous dinosaurs 52 mammal species 52 species 52 marine reptiles 52 interbred 52 theropods 52 dinosaur fossil 52 Raptorex 52 Jurassic Period 52 arthropod 52 mammalian species 52 carnivorous dinosaur 52 H. erectus 52 herbivorous 51 tiger mosquito 51 palaeontologists 51 marten 51 Beringia 51 Neandertal 51 crocodilian 51 vertebrate animals 51 wooly mammoth 51 Homo sapiens 51 prehistoric 51 clouded leopard 50 fallow deer 50 mammoths 50 primate evolution 50 Mammoths 50 pliosaur 50 anthropoids 50 sauropod 50 coprolites 50 rhinoceroses 50 toothed whales 50 frog species 50 anthropoid 50 Argentine ants 50 thylacine 50 tyrannosaurs 50 placental mammals 50 Cretaceous Period 50 ant species 50 grebe 49 monkeys apes 49 Gypsy moths 49 horned rhinoceros 49 saber toothed tigers 49 frogs toads 49 Greater Yellowstone Ecosystem 49 Iberian lynx 49 skink 49 domesticated 49 ungulate 49 Neanderthals 49 melanogaster 49 grassy plains 49 vertebrates 49 Gigantoraptor 49 ground sloths 49 erectus 49 Early Cretaceous 49 hominins 49 theropod dinosaurs 49 western lowland gorillas 49 temperate rainforest 49 coniferous forests 49 woolly mammoth 49 Fertile Crescent 48 Paleontologists 48 invertebrate species 48 amphibian species 48 hominid 48 Migrating birds 48 fossilized bones 48 sauropods 48 dinosaur 48 extirpated