Related by context. Frequent words. (Click for all words.) 57 ichthyosaur 55 Indohyus 55 homo erectus 55 hominid species 54 amphibians reptiles 54 fossilized skull 54 mosasaurs 53 fossilized teeth 53 kipunji 53 woolly mammoths 52 nonhuman primate 52 saber toothed cat 52 horned dinosaur 52 Scientists theorize 52 theropod 52 phylogenetic analysis 52 australopithecines 51 wooly mammoth 51 feathered dinosaurs 51 Otzi 51 Mammoths 51 hadrosaur 51 trilobite 51 Paranthropus 50 Brusatte 50 Poinar 50 placental mammals 50 peccary 50 microcephalic 50 ground sloths 50 Columbian mammoth 50 mitochondrial genome 50 H. erectus 50 paleobiology 50 Ardipithecus ramidus 50 tyrannosaur 50 dinosaur species 50 tetrapod 50 theropod dinosaurs 50 tigers leopards 50 braincase 50 Fossilized 50 hominid fossils 49 plesiosaurs 49 Ediacaran 49 mammoth tusks 49 Torosaurus 49 morphologically 49 fossil specimens 49 Ötzi 49 International HapMap Project 48 horned dinosaurs 48 fossilized skeleton 48 preserved fossils 48 mammalian genomes 48 vertebrate animals 48 H. sapiens 48 Siberian permafrost 48 Neolithic Age 48 Siberian tundra 48 H. floresiensis 48 simian virus 48 Gansus 47 Willerslev 47 fossilized remains 47 clouded leopard 47 genome mapping 47 microfossils 47 Beringia 47 Altai Mountains 47 chimp genome 47 Pääbo 47 T.rex 47 Vertebrate 47 Mitochondrial DNA 47 unicellular 47 LB1 47 woolly mammoth 47 Raptorex 47 Homo habilis 47 mammoths 47 carnivorous dinosaurs 47 hadrosaurs 47 Pterosaurs 47 Smilodon 47 palaeontology 47 Tiktaalik 47 transmissible spongiform encephalopathies 47 phylogenetic tree 47 Irmis 47 carnivorous dinosaur 47 erectus 47 cone snails 47 genomic sequence 46 Darwin finches 46 wooly mammoths 46 predatory dinosaurs 46 phenotyping 46 Lemurs 46 Darwinius 46 pinniped