Related by context. Frequent words. (Click for all words.) 58 Kalahari Desert 55 Ngorongoro Crater 55 Great Rift Valley 53 savanna 53 temperate forests 52 Namib Desert 52 arid lands 52 limestone caves 52 paleoclimate 52 fossils 51 African savanna 51 western lowland gorillas 51 tropics 50 highlands 50 Beringia 50 semi arid 50 Archaean 50 biodiversity hotspots 49 Kalahari desert 49 termite mounds 49 Lake Turkana 49 Tanzania 49 evergreen forests 49 anthropoids 49 Fossils 49 palaeontology 49 microfossils 48 Rwenzori Mountains 48 Kenya 48 undersea volcanoes 48 limestone cave 48 volcanic islands 48 savannahs 48 biodiversity hotspot 48 lowland forests 48 lush rainforest 48 lake sediments 48 grassy plains 47 paleontology 47 mountain gorilla 47 arid regions 47 marine reptiles 47 preserved fossils 47 Palaeontology 47 Omo River 47 Lake Natron 47 equatorial 47 arid 47 savannas 47 savannah 47 Serengeti 47 Ardipithecus ramidus 47 Okavango Delta 47 interglacial period 47 faunal 47 Afar region 47 Fertile Crescent 46 marine invertebrates 46 Polar Regions 46 drylands 46 endangered mountain gorillas 46 Dian Fossey 46 indigenous cultures 46 alluvial deposits 46 fossil 46 paleontological 46 Albinos 46 Dry Valleys 46 Rift Valley 46 mole rats 46 Frans de Waal 46 African savannah 46 tropical rainforests 46 megafauna 46 Ngorongoro 46 temperate zones 46 Ethiopia 46 biogeography 46 mud volcanoes 46 extremophiles 46 hydrothermal vent 46 Skeleton Coast 46 semi nomadic 45 geomorphology 45 Masai Mara 45 ammonites 45 ethnological 45 palaeontologist 45 snail shells 45 coelacanth 45 Gona 45 subtropical regions 45 tropical rainforest 45 dinosaur fossils 45 lava tubes 45 Taman Negara 45 anthropological 45 semiarid 45 monkeys apes 45 barrens 45 tropical forests