Related by context. Frequent words. (Click for all words.) 52 Australopithecus afarensis 49 fossilized remains 47 hominid 46 interglacial period 46 Cretaceous Period 45 Homo erectus 45 supercontinent 44 Neanderthal genome 44 Homo habilis 43 Ardipithecus 43 hominids 43 common ancestor 43 Australopithecus 43 Neanderthal DNA 43 anatomically modern 43 vertebrate species 43 fossils 43 Homo sapiens 42 Denisovans 42 fossilized bones 42 genus Homo 41 H. erectus 40 Late Cretaceous 40 hominins 40 Homo floresiensis 40 Burundian refugees 40 landmass 39 coprolites 39 microfossils 39 inhabitants 39 ancestral roots 39 interglacial 38 ancient civilization 38 fossil 38 tyrannosaurs 38 Paleontologists 38 Tiktaalik 38 prehistoric 38 ancestors 38 Posted -# sec 38 ancestor 38 single celled organisms 37 palaeontologists 37 sparsely settled 37 sauropod 37 Homo Sapiens 37 sextillion 37 dinosaurs 37 Neandertal 37 millenniums 37 homo sapiens 37 hunter gatherers 37 Paabo 37 Archaeopteryx 37 preindustrial 36 single celled 36 sq.km 36 genome sequenced 36 primates 36 simian immunodeficiency virus 36 Cassini Huygens 36 mammal species 36 millennia 36 scientists 36 millenia 36 sqkm 36 megafauna 35 Neandertals 35 hadrosaur 35 habitants 35 tyrannosaur 35 Neanderthals 35 pterosaur 35 NASA Kepler 35 Ardi 34 multicellular organisms 34 square kilometer 34 Shahram Amiri 34 chimpanzees 34 humans 34 Poinar 34 semi nomadic 34 mass extinction 33 hominin 33 archaea 33 Geneticists 33 carnivorous dinosaurs 33 Ivorian refugees 33 Forecasts ranged 33 primate species 33 tetrapods 33 human genome 33 multicellular 33 sauropods 33 theropod 32 vertebrates 32 Fossils 32 discoverers 32 sq km 32 nomadic tribe 32 mammals