Related by context. Frequent words. (Click for all words.) 60 prehistory 59 prehistoric 57 Neolithic 56 Archaic 56 Bronze Age 55 Paleolithic 54 Anasazi 54 pre Columbian 54 Pleistocene 54 Mesoamerica 51 Paleo 50 pottery shards 50 hunter gatherers 50 Eocene 50 Prehistoric 50 fossil 50 fossils 49 archeological 49 Pliocene 49 paleontological 49 Cretaceous 49 archaeological 49 radiocarbon dating 48 Iron Age 48 Precambrian 47 Ordovician 47 Hellenistic 47 Spanish conquistadors 47 burial mounds 46 radiocarbon 46 paleo 46 Fossils 46 hominids 46 archaeologists 46 mammoths 46 hunter gatherer 46 chert 45 mastodons 45 Native Americans 45 dinosaur fossils 45 pictographs 45 Artifacts 45 geologic 45 Archeological 45 Hohokam 45 fossilized 45 Archaeological 45 #BC [003] 45 Neanderthals 45 archeologists 44 Homo sapiens 44 homesteading 44 Neanderthal 44 millennium BC 44 excavated 44 petroglyphs 44 Sumerian 44 Anthropologists 44 archeology 44 Mayan 44 Mayans 43 Holocene 43 Mesozoic 43 ancient 43 Triassic 43 dinosaurs 43 arrowheads 43 Archaeology 43 Archaeologist 43 archeological sites 43 #th century 43 mastodon 43 archaeologist 43 sauropod 42 anthropologists 42 woolly mammoths 42 Jurassic 42 ancient civilization 42 fossilized remains 42 archaeological sites 42 colonization 42 ancient civilizations 42 Incas 42 artifacts 42 Little Ice Age 42 glaciation 42 Mayan civilization 42 Antiquity 42 petrified wood 42 antiquity 42 Proterozoic 41 Australopithecus 41 paleontologists 41 archaeological excavations 41 homesteader 41 colonized 41 hominid 41 Pharaonic 41 Middle Ages 41 geological formations 41 primitive