Related by context. Frequent words. (Click for all words.) 56 Great Rift Valley 55 fossils 54 Australopithecus afarensis 54 prehistoric 54 Okavango Delta 54 Kalahari desert 52 Prehistoric 52 Kalahari Desert 52 Gona 52 Australopithecus 52 dinosaur fossil 51 Murchison Falls 51 palaeontology 51 dinosaur fossils 51 limestone cave 50 fossil 50 termite mounds 50 Homo habilis 50 dinosaur skeletons 50 hominid 50 hominin 50 fossilized remains 50 Masai Mara 50 Late Cretaceous 50 African savannah 50 Lalibela 50 Bwindi 49 royal tombs 49 anthropoids 49 Mt Kilimanjaro 49 paleontology 49 palaeontologist 49 mountain gorilla 49 prehistory 49 Leakey 49 microfossils 49 paleontological 48 African savanna 48 Mesolithic 48 H. erectus 48 giant tortoises 48 limestone caves 48 Tanzania 48 cliff dwellings 48 Egyptian pyramids 48 hominins 48 Etosha 48 hominids 48 Batwa 48 lemur 48 Burgess Shale 47 archeological 47 dinosaur footprints 47 giant tortoise 47 fossilized bones 47 Indohyus 47 Homo erectus 47 endangered primates 47 extinct volcano 47 Maasai Mara 47 coelacanth 47 palaeontologists 46 Homo sapiens 46 archaeological 46 Dian Fossey 46 skink 46 paleoanthropologist 46 archaeological discoveries 46 Luangwa 46 Mapungubwe 46 tropical rainforest 46 feathered dinosaurs 46 carnivorous dinosaurs 46 archaeological digs 46 gorillas 46 hunter gatherers 46 savanna 46 astronomical observatory 46 Galápagos Islands 46 Dogon 46 Natural History Museum 46 lava tubes 46 Tsavo East 46 okapi 46 Iron Age 45 primeval forest 45 Okavango 45 Galapagos islands 45 trilobites 45 dinosaurs roamed 45 Peruvian Andes 45 Human Origins 45 Safari Lodge 45 savannah 45 Homo floresiensis 45 marine reptiles 45 classical antiquity 45 Nigersaurus 45 mountain gorillas 45 archeological digs 45 flint tools